15=2(2a+4)-(1+2a)

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Solution for 15=2(2a+4)-(1+2a) equation: 



15=2(2a+4)-(1+2a)

We move all terms to the left:

15-(2(2a+4)-(1+2a))=0

We add all the numbers together, and all the variables

-(2(2a+4)-(2a+1))+15=0



We calculate terms in parentheses: -(2(2a+4)-(2a+1)), so:

2(2a+4)-(2a+1)

We multiply parentheses

4a-(2a+1)+8

We get rid of parentheses

4a-2a-1+8

We add all the numbers together, and all the variables

2a+7

Back to the equation:

-(2a+7)



We get rid of parentheses

-2a-7+15=0

We add all the numbers together, and all the variables

-2a+8=0

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

-2a=-8

a=-8/-2

a=+4

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