-7(-1+3a)=5(3-a)

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Solution for -7(-1+3a)=5(3-a) equation: 



-7(-1+3a)=5(3-a)

We move all terms to the left:

-7(-1+3a)-(5(3-a))=0

We add all the numbers together, and all the variables

-7(3a-1)-(5(-1a+3))=0

We multiply parentheses

-21a-(5(-1a+3))+7=0



We calculate terms in parentheses: -(5(-1a+3)), so:

5(-1a+3)

We multiply parentheses

-5a+15

Back to the equation:

-(-5a+15)



We get rid of parentheses

-21a+5a-15+7=0

We add all the numbers together, and all the variables

-16a-8=0

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

-16a=8

a=8/-16

a=-1/2

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