Question

How do you solve `x= y + 3` and `3x - 2y = 4` using substitution?

Answer 1

`y=-5`

`x=-2`

Explanation:

`x=y+3` ----1
`3x-2y=4` ----2

subtitute 1 into equation 2

`3(y+3)-2y=4`
`3y+9-2y=4`
`y+9=4`
`y=-5`

subtitute `y=-5` into equation 1

`x=(-5)+3`
`x=-2`