-a+15=a+6-3

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Solution for -a+15=a+6-3 equation: 



-a+15=a+6-3

We move all terms to the left:

-a+15-(a+6-3)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-1a-(a+3)+15=0

We get rid of parentheses

-1a-a-3+15=0

We add all the numbers together, and all the variables

-2a+12=0

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

-2a=-12

a=-12/-2

a=+6

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