3(4+n)=15

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Solution for 3(4+n)=15 equation: 



3(4+n)=15

We move all terms to the left:

3(4+n)-(15)=0

We add all the numbers together, and all the variables

3(n+4)-15=0

We multiply parentheses

3n+12-15=0

We add all the numbers together, and all the variables

3n-3=0

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

3n=3

n=3/3

n=1

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