3n-7n-18=30

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Solution for 3n-7n-18=30 equation: 



3n-7n-18=30

We move all terms to the left:

3n-7n-18-(30)=0

We add all the numbers together, and all the variables

-4n-48=0

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

-4n=48

n=48/-4

n=-12

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