3(-2n+9)=15

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



3(-2n+9)=15

We move all terms to the left:

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

We multiply parentheses

-6n+27-15=0

We add all the numbers together, and all the variables

-6n+12=0

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

-6n=-12

n=-12/-6

n=+2

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