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2 years ago

14

THIS IS FOR 27 POINTS!!! EXPLAIN PLEASE!!!! Solve -9(2+a) + 4(2a+9)=11

2 answers:

Sindrei [870]2 years ago

8 0

So,

First you have to distribute the numbers outside of the parentheses (you multiply them with the numbers inside of the parentheses

-18+(-9a) + 8a +36=11
Then collect like terms
18-1a =11
-18 -18
---------------------
-1a=-7
Divide both sides by -1
a=7

Verdich [7]2 years ago

3 0

$-9(2+a) + 4(2a+9)=11\\ -18-9a+8a+36=11\\ -a=-7\\ a=7$

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