anonymous
  • anonymous
13x=7x+5
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
PhoenixFire
  • PhoenixFire
Solve for x?
anonymous
  • anonymous
yes, i dont even know where to start!!!!
zzr0ck3r
  • zzr0ck3r
subtract 7x from both sides and tell me what you got

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
5/6
anonymous
  • anonymous
=x
zzr0ck3r
  • zzr0ck3r
@rainbow dont just give answers. Please read rules.
PhoenixFire
  • PhoenixFire
\[13x=7x+5\] Subtract 7x from both sides. \[13x-7x=7x-7x+5\] Combine like terms \[6x=5\] Divide both sides by 6 \[x={5 \over 6}\]
zzr0ck3r
  • zzr0ck3r
we are not saposed to give them the answers, you should involve them in getting the answer...
PhoenixFire
  • PhoenixFire
Sorry @zzr0ck3r I'll remember for next time.
anonymous
  • anonymous
AHHHHH..Thank you so much Phoenixfire for explaining!!!
anonymous
  • anonymous
X-2/5=1/2
anonymous
  • anonymous
how would i start this one?
PhoenixFire
  • PhoenixFire
Add 2/5 to both sides. What do you get?
anonymous
  • anonymous
im horrible at this!!! add 2/5 to 2/5 and 1/2?
PhoenixFire
  • PhoenixFire
Yes. type out the entire equation with 2/5 added to both sides.
PhoenixFire
  • PhoenixFire
@mlbach Did you get it?
anonymous
  • anonymous
no, im sorry, trying to do it on paper
anonymous
  • anonymous
im 38 and math is like a foreign language to me!
PhoenixFire
  • PhoenixFire
You have \[x-{2 \over 5}={1 \over 2}\] So, add 2/5. You get: \[x-{2 \over 5}+{2 \over 5}={1 \over 2}+{2 \over 5}\] Try solve from there.
anonymous
  • anonymous
x-4/5=9/10
anonymous
  • anonymous
is that right...9/10
PhoenixFire
  • PhoenixFire
You can see that the -2/5+2/5 results in 0. \[x-0={1 \over 2}+{2 \over 5}\] But you got the right hand side correct.
anonymous
  • anonymous
ok, they cancel each other out right?
PhoenixFire
  • PhoenixFire
Correct! So, \[x={9 \over 10}\]
anonymous
  • anonymous
YAY!!!!! thank you!!!
PhoenixFire
  • PhoenixFire
No problem. :) Any other problems?
anonymous
  • anonymous
2/7X=6
PhoenixFire
  • PhoenixFire
\[{2 \over 7}x=6\] Divide both sides by 2/7. The one the left will cancel and then you're left with x=??
anonymous
  • anonymous
how do i know that im dividing?
PhoenixFire
  • PhoenixFire
\[{2 \over 7}x=6\] Divide by 2/7\[{{{2 \over 7}x} \over {2 \over 7}}={6 \over {2 \over 7}}\]
PhoenixFire
  • PhoenixFire
\[{{2 \over 7} \over {2 \over 7}}=1\] Do you understand that? Anything divided by itself is 1.
anonymous
  • anonymous
yes
anonymous
  • anonymous
i just dont know how to do 6 divided by 2/7
PhoenixFire
  • PhoenixFire
So, that leave \[1x={6 \over {2 \over 7}}\] Now, a trick is to dividing by fractions: \[{a \over {b \over c}}={{c \over b}a}\] You flip the bottom fraction and multiply the top by it. Giving you: \[{6 \over {2 \over 7}}={7 \over 2}6\] Or \[{7*6} \over 2\]
PhoenixFire
  • PhoenixFire
Sorry about the bad grammar.. That was truly horrible.
anonymous
  • anonymous
21?
PhoenixFire
  • PhoenixFire
Yes! \[x=21\]
anonymous
  • anonymous
can i just put you in my pocket and and take you to class with me?
PhoenixFire
  • PhoenixFire
Hahaha. Yes, if you have a cell phone and internet on it. :)
anonymous
  • anonymous
lol
anonymous
  • anonymous
A telephone book has white pages and yellow pages. ¾ of the book consists of the white pages; the yellow pages number 300. What is the total number of pages in the telephone book?
anonymous
  • anonymous
how would i start this one
PhoenixFire
  • PhoenixFire
White=3/4 of the book Yellow=1/4 of the book. So, if 1/4 of the book is 300. How many total pages are there?
anonymous
  • anonymous
900
PhoenixFire
  • PhoenixFire
Almost. Y=yellow=1/4=300 W=white=3/4=300*3 T=total=W+Y=(300*3)+300=1200
anonymous
  • anonymous
ah. i got it
anonymous
  • anonymous
A theater usher at a Broadway musical finds that ½ of the patrons attending a performance are in their seats by show time. The remaining 60 people are seated after the opening number. If the show is always a complete sellout, how many seats does the theater have?
PhoenixFire
  • PhoenixFire
This one is mostly a play on words. If you single out a few words: "1/2", "remaining", "sellout" From this you can see that "sellout" says all seats are taken. "remaining" means those not seated initially. "1/2" the initial people seated. So, if "half" of the attendees are seated before the show, and the "remaining" are seated after the first number. How many seats are there in the theater which is "sold out (ie all seats taken)"?
PhoenixFire
  • PhoenixFire
*** "remaining 60" ***
anonymous
  • anonymous
120?
PhoenixFire
  • PhoenixFire
Correct!
anonymous
  • anonymous
YAY!!!! lol
PhoenixFire
  • PhoenixFire
Getting the hang of it?
anonymous
  • anonymous
right now i am, but come test time, I'll draw a blank!
anonymous
  • anonymous
Of those invited to a wedding, 2/7 were friends of the bride. The friends of the groom numbered 65. How many people were invited to the wedding
PhoenixFire
  • PhoenixFire
Haha. Of course. Nobody can avoid the blank come test time.
anonymous
  • anonymous
unfortunatley not!
anonymous
  • anonymous
what do i look at first?
PhoenixFire
  • PhoenixFire
bride=2/7 Therefore, groom=5/7=65 You can take this known number as a percentile of the total attendees. \[{5 \over 7}T=65\] Where T= the total number of people attending. Now solve for T.
anonymous
  • anonymous
where did you get 5/7 from?
PhoenixFire
  • PhoenixFire
Well if the brides guests are 2/7 of the attending people. then the grooms is the remaining guests. Correct? so 1-2/7 = 5/7
anonymous
  • anonymous
oh ok
PhoenixFire
  • PhoenixFire
To solve for T you use the same method as one of the other problems above. The funny trick with dividing by fractions.
PhoenixFire
  • PhoenixFire
Got it yet?
anonymous
  • anonymous
not quite
PhoenixFire
  • PhoenixFire
What are you stuck on?
anonymous
  • anonymous
5/7T=65....i get stuck on how to work the problem out
PhoenixFire
  • PhoenixFire
Well you want to isolate T. Because that's the unknown variable that you want to become known. So in this case, the only way to do that is to remove the 5/7 from T. You will want to divide by 5/7 to make it cancel out, leaving T alone on the left.
anonymous
  • anonymous
so do i divide both sidesby 5/7?
anonymous
  • anonymous
answer is 91?
PhoenixFire
  • PhoenixFire
Yes. Because if you change the equation on the left, you have to change it in the same way on the right for the equality to hold. 91 is correct!
anonymous
  • anonymous
awesome!!!!
anonymous
  • anonymous
thank you so much for your help, I appreciate it!
PhoenixFire
  • PhoenixFire
No problem at all. Become a fan of me, and if you need help just send me a message.
anonymous
  • anonymous
Done!

Looking for something else?

Not the answer you are looking for? Search for more explanations.