Question

How do you solve -2x + y = -1 and x + y = 5?

Answer 1

`(2,3)`

Explanation:

We have:

`-2x+y=-1`

`x+y=5`

We can subtract the second equation from the first:

`-2x+y-(x+y)=-1-5`

`-2x+y-x-y=-6`

`-3x=-6`

`x=2`

We can input this into equation 2:

`2+y=5`

`y=3`

The answer is `(2,3)`