Question

How do you solve using gaussian elimination or gauss-jordan elimination, `x-3y=6` and `x+6y=0`?

Answer 1

`x=4` and `y=-2/3`

Explanation:

From `x+6y=0`, `x=-6y`. Hence `x-3y=6` became `-9y=6`. So,

`y=6/(-9)=-2/3` and `x=(-6)*(-2/3)=4`