How do you solve #-3(4 + x) = 15#?

1 Answer
May 12, 2016

Answer:

x=-9

Explanation:

#-3(4+x)=15#

Multiply every 4 and x by -3
#-12-3x=15#

Carry over -12 to the right side of the equal sign and add it to 15 and cancel out -12 on the other side:
#-3x=15+12#
#-3x=27#

Divide 27 by -3 and cancel out -3 on the other side:
#-3x/-3=27/-3#

The answer is x=-9