3+15a=12+6a+-6a

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Solution for 3+15a=12+6a+-6a equation: 



3+15a=12+6a+-6a

We move all terms to the left:

3+15a-(12+6a+-6a)=0

We add all the numbers together, and all the variables

15a+3-0=0

We add all the numbers together, and all the variables

15a+3=0

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

15a=-3

a=-3/15

a=-1/5

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