15=4a-(2a+3)

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Solution for 15=4a-(2a+3) equation: 



15=4a-(2a+3)

We move all terms to the left:

15-(4a-(2a+3))=0



We calculate terms in parentheses: -(4a-(2a+3)), so:

4a-(2a+3)

We get rid of parentheses

4a-2a-3

We add all the numbers together, and all the variables

2a-3

Back to the equation:

-(2a-3)



We get rid of parentheses

-2a+3+15=0

We add all the numbers together, and all the variables

-2a+18=0

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

-2a=-18

a=-18/-2

a=+9

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