Question

How do you solve the system `y=2x` and `x+3y=-14` using substitution?

Answer 1

`(-2, -4)`

Explanation:

Substitute the `2x` in for `y` in the second equation:

`x+3(2x)=-14`

`x+6x=-14`

`7x=-14`

`x=-2`

We know that `x` is `-2` and that `y` is `2*x`.

`y=2*-2`

`y=-4`

`(-2, -4)`