111=-7(-3-5a)-5a

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Solution for 111=-7(-3-5a)-5a equation: 



111=-7(-3-5a)-5a

We move all terms to the left:

111-(-7(-3-5a)-5a)=0

We add all the numbers together, and all the variables

-(-7(-5a-3)-5a)+111=0



We calculate terms in parentheses: -(-7(-5a-3)-5a), so:

-7(-5a-3)-5a

We add all the numbers together, and all the variables

-5a-7(-5a-3)

We multiply parentheses

-5a+35a+21

We add all the numbers together, and all the variables

30a+21

Back to the equation:

-(30a+21)



We get rid of parentheses

-30a-21+111=0

We add all the numbers together, and all the variables

-30a+90=0

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

-30a=-90

a=-90/-30

a=+3

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