4a-15=a+12

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Solution for 4a-15=a+12 equation: 



4a-15=a+12

We move all terms to the left:

4a-15-(a+12)=0

We get rid of parentheses

4a-a-12-15=0

We add all the numbers together, and all the variables

3a-27=0

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

3a=27

a=27/3

a=9

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