SOLUTION: 9(2x+8)=20-(x+5)

Algebra ->  Expressions-with-variables -> SOLUTION: 9(2x+8)=20-(x+5)      Log On


   

Question 25161: 9(2x+8)=20-(x+5)
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
For additional help with equation solving, see my Lesson Plan in algebra.com for Equation Solving.

9(2x+8)=20-(x+5)
18x + 72 = 20 - x - 5
18x + 72 = 15 - x

Add +x to each side:
18x + 72 + x = 15 -x + x
19x + 72 = 15

Subtract 72 from each side:
19x + 72 - 72 = 15 - 72
19x = - 57

Divide both sides by 19, and believe it or not, IT COMES OUT NICELY!!
%2819x%29%2F19=+-57%2F19
x=+-3

After this good fortune, how about checking it?
9(2x+8)=20-(x+5)
9(-6+8)= 20 -(-3+5)
9(2) = 20 - 2
18=18
It checks!!

R^2 at SCC