Question

How do you solve the system by addition `x + y = 4` and `x – y = 6`?

Answer 1

`x=5, y=-1`

Explanation:

`x+y=4 -----(1)`
`x-y=6 -----(2)`

`(1)+(2) => 2x=10 => x=5`
substitute x=5 into (1) `=> 5+y=4`
`=> y=-1`