Question

How do you solve `-2x – 0y = -4` and `-6x – 2y = -12`?

Answer 1

`(x,y)=(2,0)`

Explanation:

Given
[1]`color(white)("XXX")-2x-0y=-4`
[2]`color(white)("XXX")-6x-2y=-12`

From [1] we have
[3]`color(white)("XXX")-2x=-4`

[4]`color(white)("XXX")x=2`

Substituting `2` for `x` (from [4]) into [2]
[5]`color(white)("XXX")-6(2)-2y=-12`

[6]`color(white)("XXX")-12-2y=-12`

[7]`color(white)("XXX")-2y=0`

[8]`color(white)("XXX")x=0`