-3+2a=7a-7(a-1)

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Solution for -3+2a=7a-7(a-1) equation: 



-3+2a=7a-7(a-1)

We move all terms to the left:

-3+2a-(7a-7(a-1))=0



We calculate terms in parentheses: -(7a-7(a-1)), so:

7a-7(a-1)

We multiply parentheses

7a-7a+7

We add all the numbers together, and all the variables

7

Back to the equation:

-(7)



We add all the numbers together, and all the variables

2a-10=0

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

2a=10

a=10/2

a=5

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