-3a-4=9a

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Solution for -3a-4=9a equation: 



-3a-4=9a

We move all terms to the left:

-3a-4-(9a)=0

We add all the numbers together, and all the variables

-12a-4=0

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

-12a=4

a=4/-12

a=-1/3

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