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4vir4ik [10]
3 years ago
14

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

Mathematics
2 answers:
Sindrei [870]3 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]3 years ago
3 0
-9(2+a) + 4(2a+9)=11\\ -18-9a+8a+36=11\\ -a=-7\\ a=7
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