-9-a=4(1+3a)

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Solution for -9-a=4(1+3a) equation: 



-9-a=4(1+3a)

We move all terms to the left:

-9-a-(4(1+3a))=0

We add all the numbers together, and all the variables

-a-(4(3a+1))-9=0

We add all the numbers together, and all the variables

-1a-(4(3a+1))-9=0



We calculate terms in parentheses: -(4(3a+1)), so:

4(3a+1)

We multiply parentheses

12a+4

Back to the equation:

-(12a+4)



We get rid of parentheses

-1a-12a-4-9=0

We add all the numbers together, and all the variables

-13a-13=0

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

-13a=13

a=13/-13

a=-1

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