-69=3(1+6a)

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Solution for -69=3(1+6a) equation: 



-69=3(1+6a)

We move all terms to the left:

-69-(3(1+6a))=0

We add all the numbers together, and all the variables

-(3(6a+1))-69=0



We calculate terms in parentheses: -(3(6a+1)), so:

3(6a+1)

We multiply parentheses

18a+3

Back to the equation:

-(18a+3)



We get rid of parentheses

-18a-3-69=0

We add all the numbers together, and all the variables

-18a-72=0

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

-18a=72

a=72/-18

a=-4

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