Question

If `f(x) = 3x - 4`, how do you solve f(x) = 5?

Answer 1

`x=3`

Explanation:

If
`color(white)("XXX")f(x)=3x-4`
and
`color(white)("XXX")f(x)=5`
then
`color(white)("XXX")3x-4 = 5`

Add `4` to both sides:
`color(white)("XXX")3x=9`

Divide both sides by `3`
`color(white)("XXX")x=3`