3a+6=15+a

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



3a+6=15+a

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

3a-a-15+6=0

We add all the numbers together, and all the variables

2a-9=0

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

2a=9

a=9/2

a=4+1/2

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