3*n-7+n=73

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Solution for 3*n-7+n=73 equation: 



3n-7+n=73

We move all terms to the left:

3n-7+n-(73)=0

We add all the numbers together, and all the variables

4n-80=0

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

4n=80

n=80/4

n=20

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