Question

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

3x + y = 8
-x - 2y = -10

-2y + 10

2y + 10

2y - 10

-2y - 10

Answer 1

The question is asking you to solve the second equation for x.
-x-2y=-10, add 2y to both sides
-x=2y-10, multiply both side by -1
x=-2y+10

Answer 2

Thnx

Answer 3

Glad to help