-3(7-n)=15

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Solution for -3(7-n)=15 equation: 



-3(7-n)=15

We move all terms to the left:

-3(7-n)-(15)=0

We add all the numbers together, and all the variables

-3(-1n+7)-15=0

We multiply parentheses

3n-21-15=0

We add all the numbers together, and all the variables

3n-36=0

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

3n=36

n=36/3

n=12

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