9a+12a=-15a

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Solution for 9a+12a=-15a equation:



9a+12a=-15a
We move all terms to the left:
9a+12a-(-15a)=0
We add all the numbers together, and all the variables
21a-(-15a)=0
We get rid of parentheses
21a+15a=0
We add all the numbers together, and all the variables
36a=0
a=0/36
a=0

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