Question

For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

-x + 2y = -6
3x + y = 8

-2y + 6

2y - 6

2y + 6

-2y - 6

Answer 1

Well, rearrange the first equation and you do this:

-x + 2y = -6
to get
-x = -2y -6
Divide by -1 and you get:
x = 2y + 6.