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

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



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

We move all terms to the left:

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

We multiply parentheses

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



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

3(a+5)

We multiply parentheses

3a+15

Back to the equation:

-(3a+15)



We get rid of parentheses

7a-3a-15-21=0

We add all the numbers together, and all the variables

4a-36=0

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

4a=36

a=36/4

a=9

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