erinhass
I need help solvin the equation x/7-8=-10
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godorovg
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okay I am ready and reporting to you help..
tiffanymak1996
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x/7 =-10+8
tiffanymak1996
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x/7 = -2
x=7 times -2
x=-14
godorovg
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we are solving for x right?
erinhass
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yes
tiffanymak1996
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check your answer:
x=-14
x/7 -8
= (-14)/7 -8
=-2-8
=-10
godorovg
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no no you can't do that when x/7 no
tiffanymak1996
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why?
godorovg
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whenever you see / it means divide
godorovg
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so therefore we x divided by 7
tiffanymak1996
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yeah, i know, when you change sides, it becomes mutiplying
godorovg
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correct
erinhass
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???
tiffanymak1996
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but you have to change sides with addition (or subtraction first before you can change sides with division)
erinhass
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so it should be 7x=-14
erinhass
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then divide by 7?
godorovg
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no it's divided here so that can not happen
godorovg
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anytime you have something divided by something you times it
godorovg
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in order for the x or whatever you are solving for.
erinhass
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ok, let's do this one for clarity.......1-n/5=12
erinhass
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subtract -1 from both sides...
erinhass
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you have n/5=11
erinhass
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so the answer is 55?
tiffanymak1996
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negative sign!
tiffanymak1996
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you should have
-n/5 =11
erinhass
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-11?
erinhass
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oh, I see!!!
godorovg
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guys if you are doing this right than have X=??
erinhass
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-55
tiffanymak1996
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1- n/5 =12
1 -1 -n/5 =12-1
-n/5 =11
-n=55
n=-55
erinhass
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yipee!
tiffanymak1996
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gr8!
just make sure you don't get confused with the signs
godorovg
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oh I see what you are doing now, I go step by step that is why I was thrown off by what you did
tiffanymak1996
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sry!
erinhass
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6t +3=-7
erinhass
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subtract 3 from both sides
tiffanymak1996
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and you can always check your answers by substituting x=? in you equation
erinhass
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6t=-10
erinhass
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divide by 6?
tiffanymak1996
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yes
erinhass
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answer is -2?
tiffanymak1996
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what is -10 divided by 6?
erinhass
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something isn't right, that is not one of my answwer choices
godorovg
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10 goes into 2 five and 2 goes into 6 3 so the answer is -5/3
tiffanymak1996
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well your steps are all correct...
erinhass
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I didn't have the lowest denominator
tiffanymak1996
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usually the answers are in simplest form, so simplify your fractions
tiffanymak1996
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what choices do you have?
godorovg
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Tiffany I am so sorry about this, I was trying to walk through the steps here so you could ask questions. if you have this I will go
erinhass
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I have -5/3 as an answer
godorovg
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no before you said -2
erinhass
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right, but godorovg came up with -5/3 and I have that as an answer choice
erinhass
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I did not simplify
godorovg
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unless it says to do it I would leave as is
erinhass
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15=-15-8u
erinhass
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add 15 to both sides
erinhass
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30-8u
erinhass
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30=-8u
erinhass
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then what?
erinhass
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divide by -8?
tiffanymak1996
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yes
erinhass
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15/-4?
erinhass
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-15/4?
tiffanymak1996
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yes
erinhass
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I need help with this one
0=1/6y+8=
erinhass
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subtract 8 from both sides
tiffanymak1996
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yes
erinhass
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0-8 is 0?
erinhass
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-8?
tiffanymak1996
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yes, -8
erinhass
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-8=1/6y
erinhass
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now what?
godorovg
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can I help here, this problem you are making it harder than it has be
tiffanymak1996
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because the variable is in the denominator, therefore we have to switch it to the other side
tiffanymak1996
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-8=1/6y
-8(6y)=1/6y times 6y
tiffanymak1996
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so you multiply both sides with 6y
godorovg
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yes that is right, although when you first start this collect all a like terms and move then to one side and than times through the number being divided
erinhass
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show me
godorovg
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okay let us take this one x/7-8=-10 now here is how I would do this
First take the -8 and add 8 to the -10 so now we have this x/7=-10+8 than take this and do the sub to get -2 so now we have x/7=-2 once you have than take the seven ant times to the two so now we have X= -14 like that
erinhass
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ok
erinhass
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-8=1/6y?
godorovg
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okay now you tell me
erinhass
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multiply both sides by 1/6?
tiffanymak1996
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you multiply both sides with 6y
godorovg
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yes
godorovg
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but it is 1/6 not just six
erinhass
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so y=1/6x8?
godorovg
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yes
erinhass
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or 48?
tiffanymak1996
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it should be y=1/-48
erinhass
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oh yes, because it was a -8
tiffanymak1996
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since:
1/6y =-8
1/(6 times-8) =y
so, y=1/-48
godorovg
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yes it that is the y=1/-48
erinhass
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okay, thanks guys! I'm tired...going to bed, goodnight! Thanks for your help!
godorovg
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hey no problem glad I could you help you :)
tiffanymak1996
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gd nite!
godorovg
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tiffany great job!!
tiffanymak1996
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u too!
tiffanymak1996
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it's funny that when erinhass says good night , it's actually good morning for me. :)
godorovg
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yeah and it's night time where I am as well
tiffanymak1996
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u live in the states?
godorovg
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yes Portland Ore
tiffanymak1996
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oh, good for u, i've always wanted to live in the states
godorovg
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yeah funny thing I have always wanted to leave the States
tiffanymak1996
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guess we would all like to explore more.
godorovg
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no not to just explore, it falls under the job market here stinks and the education system is messed up for kids, although I don't have any/
tiffanymak1996
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i'm a victim under the education system in hong kong :(
godorovg
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yeah i have heard about that as well. I am a math person that you can graphs in my head and will be studying Engineering Physics soon
godorovg
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I am what some would call human calc
tiffanymak1996
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:) good for you, sometimes i do that , and miss steps in exams, got a b instead of a, frustrating
godorovg
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yeah, that is why I tell all people that i work step by step in that way you can go back to see what is wrong.
tiffanymak1996
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yeah, i know, that's why i have to be extra careful when i'm doing my exams. And i do tutoring, helps a lot with my presentation skills
godorovg
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it drives me nuts sometimes on here when I see people skipping around. that is just plain doesn't make sense to me
tiffanymak1996
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sometimes people skip unintentionally, you know, they calculate in their head, and skipped a few steps, sometimes they don't notice it.
godorovg
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yes true and may be this is something I will have to deal with, still I can not understand why skip steps what does that prove?
tiffanymak1996
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i personally think if one is confident with that particular question, and skipping a little steps is alright, just don't skip major ones, step on scrap papers, yes you can skip, but steps in exams, no.
tiffanymak1996
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i just tell myself be considerate, and help the techer go through the papers as smoothly as possible, work hard for years just to make sure i won't skip anything.
godorovg
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you just made a fan.
tiffanymak1996
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u too.:), and thx.
godorovg
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That is what I try to do here, only that I want the person I am helping to tell what they know and I help from that point
godorovg
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I don't just do the work for them..
tiffanymak1996
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yeah, sorry about that , will work hard for that, for me it's kind of harder to explain when not face to face
godorovg
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yeah, I can how it could be hard for you, but if you want sometime I can give you tips on to do things a little better only if you want tips
godorovg
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*see
tiffanymak1996
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yeah, of course, pls do, i'm all ears :)
godorovg
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okay first what type of math do you help with this mostly?
tiffanymak1996
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algebra, calculas, and the basics, just high school stuff.
godorovg
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okay with all these subjects, you need to get the student in which you are helping to tell what they need help with.
godorovg
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than before you do any of the work have them show you what they know about that problem already and ask to see what they are having trouble with
tiffanymak1996
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ok
godorovg
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than once the it is clear, work the problem by typing it out in words and than draw it like you were doing. In the typing step by step always so the student can see what is happening where
tiffanymak1996
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ok, thx a lot!
godorovg
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sometimes it won't matter if draw the problem if student doesn't get what is going on. So that is why I type it out in all steps
tiffanymak1996
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yeah, i find that if students can figure out the problem themselves, it has a greater impression on them
godorovg
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that is always my goal as well.
godorovg
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for example this x/7-8=-10 the student wasn't getting it the whole thing that is why I typed out the steps to show that they are making it too hard.
godorovg
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also to get the student to ask questions as well
tiffanymak1996
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yeah, interaction helps.
godorovg
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A must in math, because you and the student have to be involved in order to teach
godorovg
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also just know you won't be there when they are tested. so have the student do the work and you just guide them
godorovg
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unless they just not getting it.
tiffanymak1996
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absolutly right, are you like, a teacher?
godorovg
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No. I am a Physics Engineering major in college
tiffanymak1996
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cool, always have love physics, physics rocks!
godorovg
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yeah, and bio sucks
tiffanymak1996
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same here!
godorovg
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Chem and Physics oh yeah,,
tiffanymak1996
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uh huh
godorovg
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Bio not on your life
godorovg
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Anything to do with math I love
tiffanymak1996
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sry, mom needs me to have lunch, gotta go.
godorovg
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okay have nice day
godorovg
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cya latter
tiffanymak1996
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talk later :)