-3a+3+6a=15

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



-3a+3+6a=15

We move all terms to the left:

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

We add all the numbers together, and all the variables

3a-12=0

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

3a=12

a=12/3

a=4

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