3n-15=7n+5

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Solution for 3n-15=7n+5 equation: 



3n-15=7n+5

We move all terms to the left:

3n-15-(7n+5)=0

We get rid of parentheses

3n-7n-5-15=0

We add all the numbers together, and all the variables

-4n-20=0

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

-4n=20

n=20/-4

n=-5

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