Question

-20= -7 - 4 (x=2) + 5(3x - 1)

Answer 1

K i got this

Answer 2

how do I make to where I just get x= whatever it is

Answer 3

I am on it give me a sec

Answer 4

ok thank you

Answer 5

X=* what is that

Answer 6

That has to be a mistake right?

Answer 7

I meant (x+2) not (x=2)

Answer 8

Alright then it can be done

Answer 9

ok

Answer 10

@samissmurfette , you need to distribute and combine like terms, then you can solve for x

Answer 11

I don't understand how to distribute and combine the terms. ive tried and I cant seem to do it.

Answer 12

Well this is what i am getting x=0

Answer 13

x=0? ok but how do you get to that?

Answer 14

-20= -7 - 4 (x+2) + 5(3x - 1)

To distribute, you multiply the number in front of the parenthesis to the numbers/variable inside.

Example:
2(x-4) becomes 2(x)-2(4)=2x-8

Answer 15

-20=-7-4(x+2)+5(3x-1)
-20=-7-4x-8+15x-5
X=0

Answer 16

So

-20=-7-4x-8+15x-5

to combine like terms, you get all the numbers together that dont have variables and then all the numbers that do have variables together.

-20+7+8+5=-4x+15x

Answer 17

The left hand side would add up to 0.

0=11x
0=x

Answer 18

^i confirm

Answer 19

Does that make sense?

Answer 20

sorta. im kinda slow. im sure if I looked at it long enough I would understand. thank you for your help

Answer 21

@samissmurfette , you just need practice! :)

Answer 22

yeah I do. haha.

Answer 23

Anything I can help clear up?

Answer 24

no. I got it now. its just we did it differently in class.

Answer 25

Show me how you would do it in your class

Answer 26

well we wouldn't add all the terms together. we didn't add -20 in there. it would only be 8 7 and 5 and then we would subtract 8 7 and 5 from -20 and then we divide

Answer 27

Right, it would give the same answer in the end

Answer 28

yeah you just made it shorter for me. not as much work @jackellyn