a-3=2a+6

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Solution for a-3=2a+6 equation: 



a-3=2a+6

We move all terms to the left:

a-3-(2a+6)=0

We get rid of parentheses

a-2a-6-3=0

We add all the numbers together, and all the variables

-1a-9=0

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

-a=9

a=9/-1

a=-9

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