10a+15=3a-6

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Solution for 10a+15=3a-6 equation: 



10a+15=3a-6

We move all terms to the left:

10a+15-(3a-6)=0

We get rid of parentheses

10a-3a+6+15=0

We add all the numbers together, and all the variables

7a+21=0

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

7a=-21

a=-21/7

a=-3

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