Question

How do you solve `-3(-x + 4) = -9`?

Answer 1

x=1

Explanation:

Expand the left-hand side and then bring all terms to one side and simplify.

`-3(-x+4)=-9`
`-3(-x)+(-3)(4)=-9`
`3x-12=-9`
`3x-12+9=0` [Add 9 on both sides]
`3x-3=0` [Add like terms]
`3(x-1)=0` [Factor out the common term]
`x-1=0` [Divide throughout by 3]
`x=1` [Add 1 on both sides]