Question

What is `[(-3x-8y=20),(-5x+y=19)]`?

Answer 1

`x=-4`
`y=-1`

Explanation:

`-3x-8y=20` ----------- (1)

`-5x+y=19` -------------(2) `xx`8

`-3x-8y=20` ---------------(1)
`-40x+8y=152` -------------(3) ---`(1) + (3)`

`-43x=172`
`x=172/(-43)=-4`

`x=-4`

Substitute `x=-4` in equation (2)

`-5(-4)+y=19`
`20+y=19`

`y=19-20`

`y=-1`