-84=-4(1-4a)-6a

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Solution for -84=-4(1-4a)-6a equation: 



-84=-4(1-4a)-6a

We move all terms to the left:

-84-(-4(1-4a)-6a)=0

We add all the numbers together, and all the variables

-(-4(-4a+1)-6a)-84=0



We calculate terms in parentheses: -(-4(-4a+1)-6a), so:

-4(-4a+1)-6a

We add all the numbers together, and all the variables

-6a-4(-4a+1)

We multiply parentheses

-6a+16a-4

We add all the numbers together, and all the variables

10a-4

Back to the equation:

-(10a-4)



We get rid of parentheses

-10a+4-84=0

We add all the numbers together, and all the variables

-10a-80=0

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

-10a=80

a=80/-10

a=-8

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