Question

How do you solve x+y=7 and 2x-y=2?

Answer 1

`x=3`, `y=4`

Explanation:

Given:

`{ (x+y=7), (2x-y=2) :}`

Add the two equations to eliminate `y` and get:

`3x=9`

Divide both sides by `3` to find:

`x=3`

Then:

`y = 7-x = 7-3=4`