Question

Solve this equation: 7x-1=3y+8

Answer 1

You can start by subtracting 8 from both sides.
so 7x-1=3y+8
 -8             -8
 -1x-1=3y

8 is not multiplied by x, so you cannot subtract it from 7x. It would instead be 7x-1-8=7x-9.

7x-9=3y
 You have to divide all of it:
(7x-9)/3

so y=7/3x-3