-84=6(1-3a)

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Solution for -84=6(1-3a) equation: 



-84=6(1-3a)

We move all terms to the left:

-84-(6(1-3a))=0

We add all the numbers together, and all the variables

-(6(-3a+1))-84=0



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

6(-3a+1)

We multiply parentheses

-18a+6

Back to the equation:

-(-18a+6)



We get rid of parentheses

18a-6-84=0

We add all the numbers together, and all the variables

18a-90=0

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

18a=90

a=90/18

a=5

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