-39=9a+3-2a

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Solution for -39=9a+3-2a equation: 



-39=9a+3-2a

We move all terms to the left:

-39-(9a+3-2a)=0

We add all the numbers together, and all the variables

-(7a+3)-39=0

We get rid of parentheses

-7a-3-39=0

We add all the numbers together, and all the variables

-7a-42=0

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

-7a=42

a=42/-7

a=-6

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