3n=-7n+100

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Solution for 3n=-7n+100 equation: 



3n=-7n+100

We move all terms to the left:

3n-(-7n+100)=0

We get rid of parentheses

3n+7n-100=0

We add all the numbers together, and all the variables

10n-100=0

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

10n=100

n=100/10

n=10

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