-91=7(5a-3)

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Solution for -91=7(5a-3) equation: 



-91=7(5a-3)

We move all terms to the left:

-91-(7(5a-3))=0



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

7(5a-3)

We multiply parentheses

35a-21

Back to the equation:

-(35a-21)



We get rid of parentheses

-35a+21-91=0

We add all the numbers together, and all the variables

-35a-70=0

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

-35a=70

a=70/-35

a=-2

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