9(4x-4)=3(12x+7)
when I worked t out i got just 57 no x
my choices are
all real numbers
or set is empty
which is it ?

- anonymous

- Stacey Warren - Expert brainly.com

Hey! We 've verified this expert answer for you, click below to unlock the details :)

- chestercat

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

- anonymous

okay i can help you here if you on here?

- anonymous

i am here

- anonymous

how do I write this

Looking for something else?

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

## More answers

- anonymous

show me what you did with this 9(4x-4)=3(12x+7)

- anonymous

OK, here we go

- anonymous

work with just the nine ony

- anonymous

do this only 9(4x-4) I want to see your steps.

- anonymous

9(4x-4)=3(12x+7)
36x-4=36x+7
36x-4+4=36x+7+4
36x-36x=11
ok here is where I get lost because there is no x so is the answer real or empty

- anonymous

my bad i messed up

- anonymous

9(4x-4) is
36x-36

- anonymous

yes so what is x now?

- anonymous

36 ?

- anonymous

no .. try again hint we want X alone.

- anonymous

there is no x because 36x-36x is nothing

- anonymous

lost

- anonymous

9*4=36 and
3*12 is 36

- anonymous

okay first off there are not two 36x-36x wrong. 9(4x-4) doesn't = 36x-36x no

- anonymous

36x-36 ?

- anonymous

yes

- anonymous

LOL I feel so stupid

- anonymous

don't feel that way, sometimes i make little mistakes as well. we all learn in different ways.

- anonymous

yes I know I am a visual learner

- anonymous

yes that is okay.

- anonymous

now for the other side i got 36x+21

- anonymous

hey one thing is slow down and do the steps, don't skip ahead just some friendly advice

- campbell_st

tootie you are correct with your solution the expansion is
36x - 36 = 36x + 21
subtract 36x from both sides and you get
-36 = 21
no solution

- anonymous

yes that is 36x+21 now again how do we get x alone?

- anonymous

subtract 36x-36x

- campbell_st

its basically saying y = 36x - 36
and y = 36x + 21
the lines are parallel ... so no intersection....

- anonymous

campbell yes are right about 36x-36x I wasn't at that point yet..

- campbell_st

well tootie has actually has a correct piece of maths above... sorry...

- anonymous

so the solution set is empty. right?

- anonymous

I was walking through the steps campbell

- campbell_st

correct... just practise expanding terms in brackets...

- campbell_st

the expansion of the pronumeral was correct... its just the constant term you need to be aware of

- anonymous

thank you for taking me through the steps I was not sure if I worked it right Godorovg

- anonymous

tootie 149 I was going through the steps with you, and to make sure you understood what was going

- anonymous

empty is the answer

- anonymous

Thank you so much I needed to know I worked it right, and you did that thank you again

- campbell_st

hope it helps...

- anonymous

oh no trouble at all..

- tiffanymak1996

in this case if there is no x, then the set is empty, if it's all real number, all real number would work with the equation.

- anonymous

right back at you I am a fan of yours now too. :)

- anonymous

tiffanymak could you give me an example of what you mean when it comes to real numbers

- anonymous

real numbers are 1,2,3 ,5 and so on

- anonymous

still lost when it comes to real numbers.

- tiffanymak1996

real numbers are like all kinds of number, rational, irrational, integer etc. just not complex number.

- tiffanymak1996

say: integer: - [infinite], -8, -7, -6,-5...0,1,2,3,4,5....., [infinite]
these are real no.s

- anonymous

hey tootie look at this http://math10.edcentre.ca/bridgemath/numbers/setnos.php

- tiffanymak1996

sqrt 2, sqrt3, pi etc, are real numbers

- tiffanymak1996

yeah, and well that link too.

- tiffanymak1996

almost every kind of no.s are real, except for i, (which is sqrt(-1)) the imaginary number

- anonymous

Tootie what is the biggest problem in the class you are in??

- anonymous

there is so much I do not know where to start

- anonymous

okay I am guessing this college algbra right?

- anonymous

YOU got it

- anonymous

okay first off in this class I can find you videos where can get the basics by watching would that help you?

- anonymous

but the said part my daughter was doing this in the 6th grade here, and they make little remarks about it

- anonymous

yes that would be great!!!!!!!

- anonymous

Tootie here is a shock I taught myself math through videos on the internet.

- anonymous

really please give me the links.

- tiffanymak1996

a really good site would be the paul's notes

- anonymous

okay will back

- anonymous

paul's notes

- anonymous

I will be waiting Godorovg

- campbell_st

tootie... have a look at Khan academy on youtube..or google Khan Academy... they have lots of videos explaining concepts

- anonymous

never heard of them

- tiffanymak1996

MIT has free online courses for tons of subject, i don't know about algebra but you can check out their site.

- anonymous

just looked it up thanks so much campbell_st

- anonymous

the MIT?

- tiffanymak1996

yeah

- anonymous

ok will look it up thanks so much, so much

- anonymous

tootie watch this video
http://www.youtube.com/watch?v=1Amt_-uB9QQ

- tiffanymak1996

http://ocw.mit.edu/courses/

- tiffanymak1996

that's the link

- anonymous

looking now will come back after i look at it

- anonymous

tootie it is the first part of this class

- anonymous

thanks to everyone for their help. really thanks

- anonymous

Ok

- anonymous

Always glad to help out :)

- tiffanymak1996

so, do you home study math?

- anonymous

yes and I am working on Physics and chem through MIT open course study right now. Plus Calc 1 and Cal2 as well

- tiffanymak1996

cool, i study through stanford.

- anonymous

I wish I could get in there.

- anonymous

can't now because I ran away to college when I wasn't ready GPA way too low.

- tiffanymak1996

me too, i'm only joining their for gifted child program, but still has two years to go till college.

- anonymous

yeah, funny thing is I didn't how I was gifted math either.

- tiffanymak1996

what's the difference between college and university?

- anonymous

Tiffany when I first took I couldn't get it and than day by day it started to make sense until now here I am.

- anonymous

nothing really expect for name . Now there two year and four colleges and University out there. It all depends on what you want to do in college?

- anonymous

also, depending on your major you could go on-line and get your degree.

- tiffanymak1996

i can't decide yet, math and literature is my life, but my parents wants me to be a lawyer, just to make sure i'll have enough to live by

- anonymous

Lawyers would be okay, only thing is you go to school for eight to nine years than have to past a test to become a lawyer.

- tiffanymak1996

i'll be so old by then :)

- anonymous

nah you are still pretty young I am guessing

- tiffanymak1996

nah, just old for starting to work

- anonymous

yeah it happens no big deal. I think most jobs want older people now a days

- anonymous

hey tootie what you think about the video?

- anonymous

Loved it godorvg and all of the other sites as well

- anonymous

Tootie I know in you can do this math, relax and take your time with things. Also, don;t be afraid to ask for help if you need it. There is nothing wrong in asking a questions

- anonymous

Tootie when watching these videos please take notes, it only helps you to learn the what is being taught.

- anonymous

Thank you I had no one until I found this site. I thank God for it and all of you

- anonymous

hey we are here to help you out. Please don't be afraid to send me a message and ask for help and you too Tiffany

- anonymous

Tiffany it is almost one in the morning here, must get some sleep talk with you latter.

- anonymous

good night godorovg

- anonymous

hay tiffanymak I have a word problem up can you take a look at it for me? please

- tiffanymak1996

yeah, feel free to ask

Looking for something else?

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