-113=-7(3+6a)-4a

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Solution for -113=-7(3+6a)-4a equation: 



-113=-7(3+6a)-4a

We move all terms to the left:

-113-(-7(3+6a)-4a)=0

We add all the numbers together, and all the variables

-(-7(6a+3)-4a)-113=0



We calculate terms in parentheses: -(-7(6a+3)-4a), so:

-7(6a+3)-4a

We add all the numbers together, and all the variables

-4a-7(6a+3)

We multiply parentheses

-4a-42a-21

We add all the numbers together, and all the variables

-46a-21

Back to the equation:

-(-46a-21)



We get rid of parentheses

46a+21-113=0

We add all the numbers together, and all the variables

46a-92=0

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

46a=92

a=92/46

a=2

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