Question

How do you solve for y in `2x-y=6` and `x+y=-3`?

Answer 1

`2x - y = 6`
`x + y = -3`

We can add the equations to eliminate `y` on the left hand side

`3x = 3`

`-> x = 1`

`-> y = -3 - x = -3 - 1 = color(green)(-4`