-51=3(3a+1)

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Solution for -51=3(3a+1) equation: 



-51=3(3a+1)

We move all terms to the left:

-51-(3(3a+1))=0



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

3(3a+1)

We multiply parentheses

9a+3

Back to the equation:

-(9a+3)



We get rid of parentheses

-9a-3-51=0

We add all the numbers together, and all the variables

-9a-54=0

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

-9a=54

a=54/-9

a=-6

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