Question

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

2x + y = 8
−x − y = −5

8 + 2x

8 − 2x

−8 − 2x

−8 + 2x

Answer 1

All we need to do here is solve the first equation for y. So, you're given
\[2x+y=8\] By subtracting 2x from both sides, we've successfully isolated y and have the equation we need to substitute in:
\[y=8-2x\]

Answer 2

thanks