Question

How do you determine if (-5, -4) is a solution of `9x - 4y = -6`?

Answer 1

Substitute `-5` for `x` and `-4` for `y`. Solve the equation. If both sides are equal, then `(-5,-4)` is a solution for `9x-4y=-6`. If the two sides are not equal, then `(-5,-4)` is not a solution.

Explanation:

`9x-4y=-6`

`9(-5)-4(-4)=-6`

`-45+16=-6`

`-29!=-6`

`(-5,-4)` is not a solution of `9x-4y=-6`