9a-5-3a=12a

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Solution for 9a-5-3a=12a equation: 



9a-5-3a=12a

We move all terms to the left:

9a-5-3a-(12a)=0

We add all the numbers together, and all the variables

-6a-5=0

We move all terms containing a to the left, all other terms to the right

-6a=5

a=5/-6

a=-5/6

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