161=-7(-5a-8)

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Solution for 161=-7(-5a-8) equation: 



161=-7(-5a-8)

We move all terms to the left:

161-(-7(-5a-8))=0



We calculate terms in parentheses: -(-7(-5a-8)), so:

-7(-5a-8)

We multiply parentheses

35a+56

Back to the equation:

-(35a+56)



We get rid of parentheses

-35a-56+161=0

We add all the numbers together, and all the variables

-35a+105=0

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

-35a=-105

a=-105/-35

a=+3

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