-112=-7(7-3a)

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Solution for -112=-7(7-3a) equation: 



-112=-7(7-3a)

We move all terms to the left:

-112-(-7(7-3a))=0

We add all the numbers together, and all the variables

-(-7(-3a+7))-112=0



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

-7(-3a+7)

We multiply parentheses

21a-49

Back to the equation:

-(21a-49)



We get rid of parentheses

-21a+49-112=0

We add all the numbers together, and all the variables

-21a-63=0

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

-21a=63

a=63/-21

a=-3

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