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

1 Answer
Mar 14, 2018

Answer:

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]