15=a.3-2

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Solution for 15=a.3-2 equation: 



15=a.3-2

We move all terms to the left:

15-(a.3-2)=0

We get rid of parentheses

-a.3+2+15=0

We add all the numbers together, and all the variables

-a.3+17=0

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

-a.3=-17

a=-17/1

a=-17

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