3n+n=100

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Solution for 3n+n=100 equation: 



3n+n=100

We move all terms to the left:

3n+n-(100)=0

We add all the numbers together, and all the variables

4n-100=0

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

4n=100

n=100/4

n=25

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