How do you solve #39= - 3x - 6( - x - 3)#?

1 Answer
Jul 27, 2018

Answer:

#x = 7#

Explanation:

#39 = -3x - 6(-x-3)#

Expand the right side with the distributive property:
#39 = -3x + 6x + 18#

Simplify the right side:
#39 = 3x + 18#

Subtract #color(blue)18# from both sides:
#39 quadcolor(blue)(-quad18) = 3x + 18 quadcolor(blue)(-quad18)#

#21 = 3x#

Divide both sides by #color(blue)3#:
#21/color(blue)3 = (3x)/color(blue)3#

#7 = x#

Therefore,
#x = 7#

Hope this helps!