7n+3n=30

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Solution for 7n+3n=30 equation: 



7n+3n=30

We move all terms to the left:

7n+3n-(30)=0

We add all the numbers together, and all the variables

10n-30=0

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

10n=30

n=30/10

n=3

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