9+3(a-2)=15

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Solution for 9+3(a-2)=15 equation: 



9+3(a-2)=15

We move all terms to the left:

9+3(a-2)-(15)=0

We add all the numbers together, and all the variables

3(a-2)-6=0

We multiply parentheses

3a-6-6=0

We add all the numbers together, and all the variables

3a-12=0

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

3a=12

a=12/3

a=4

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