9=7a-5(a-3)

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Solution for 9=7a-5(a-3) equation: 



9=7a-5(a-3)

We move all terms to the left:

9-(7a-5(a-3))=0



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

7a-5(a-3)

We multiply parentheses

7a-5a+15

We add all the numbers together, and all the variables

2a+15

Back to the equation:

-(2a+15)



We get rid of parentheses

-2a-15+9=0

We add all the numbers together, and all the variables

-2a-6=0

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

-2a=6

a=6/-2

a=-3

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