Question

What is the substitution for the equation

Answer 1

`y=3x` (Equation 1)

`y=x-2` (Equation 2)

We can substitute Equation 1 into Equation 2 like so:

`y=x-2`

`3x=x-2`

Subtract x from both sides:

`2x=-2`

Divide both sides by 2:

`x=-1`.

Substitute
`x=-1` into Equation 1 to find y:

`y=3x`

`y=3(-1)`

`y=-3`