Question

How do solve the following linear system?: `x+y=-4, x-y=2`?

Answer 1

`x=-1, y=-3`

Explanation:

By adding the two equations together you eliminate the `y` variable

`2x=-2`

`x=-1`

substitute `x=-1` into `x+y=-4`

`-1+y=-4`

`y=-3`