Question

How do you solve `x-y=2` and `3x+y=-10`?

Answer 1

By substitution.

Explanation:

`x = 2 + y`

`3(2 + y) + y = -10`

`6 + 3y + y = -10`

`4y = -16`

`y = -4`

`x - (-4) = 2`

`x = 2 - 4`

`x = -2`

Thus, the solution set is `{-2, -4}`.

Hopefully this helps!