Question

solve for x.
z=3x-7y

Answer 1

@RhondaSommer

Answer 2

do we change this to y=mx+b?

Answer 3

You need to keep the term with x where it is and get rid of all other terms from that side.
On the right side, you have 3x - 7y.
How do you get rid of -7y from the right side?

Answer 4

Z? are you sure it is Z?

Answer 5

ohhh no I know what you mean

Answer 6

yes i am sure it is z

Answer 7

I would do what s/he said and add 7y to both sides

Answer 8

z+7y=3x-7y+7y

Answer 9

but we cant use the y=mx+b method ?

Answer 10

no you cant. unfortunately all you can do is get x alone

Answer 11

okay i did that but what i do with the 3x?

Answer 12

i divide all the number by 3?

Answer 13

yep!

Answer 14

then i cancel out the 3 then i get x=z/3 +7y/3?

Answer 15

\[z+7y=3x\]\[\frac{z+7y}{3}=\frac{3x}{3}\]\[\frac{z+7y}{3}=x\]

Answer 16

so yep :D

Answer 17

:)