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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

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

3a+35a+21-3=0

We add all the numbers together, and all the variables

38a+18=0

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

38a=-18

a=-18/38

a=-9/19

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