3a-15=2a-12+15

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Solution for 3a-15=2a-12+15 equation: 



3a-15=2a-12+15

We move all terms to the left:

3a-15-(2a-12+15)=0

We add all the numbers together, and all the variables

3a-(2a+3)-15=0

We get rid of parentheses

3a-2a-3-15=0

We add all the numbers together, and all the variables

a-18=0

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

a=18

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