30=7n+5n

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Solution for 30=7n+5n equation: 



30=7n+5n

We move all terms to the left:

30-(7n+5n)=0

We add all the numbers together, and all the variables

-(+12n)+30=0

We get rid of parentheses

-12n+30=0

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

-12n=-30

n=-30/-12

n=2+1/2

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