15=6(8-4)+7a

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Solution for 15=6(8-4)+7a equation: 



15=6(8-4)+7a

We move all terms to the left:

15-(6(8-4)+7a)=0

We add all the numbers together, and all the variables

-(64+7a)+15=0

We get rid of parentheses

-7a-64+15=0

We add all the numbers together, and all the variables

-7a-49=0

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

-7a=49

a=49/-7

a=-7

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