7n+3n+30=100

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Solution for 7n+3n+30=100 equation: 



7n+3n+30=100

We move all terms to the left:

7n+3n+30-(100)=0

We add all the numbers together, and all the variables

10n-70=0

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

10n=70

n=70/10

n=7

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