3a+15=6a-9

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Solution for 3a+15=6a-9 equation: 



3a+15=6a-9

We move all terms to the left:

3a+15-(6a-9)=0

We get rid of parentheses

3a-6a+9+15=0

We add all the numbers together, and all the variables

-3a+24=0

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

-3a=-24

a=-24/-3

a=+8

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