3n+5n=72

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Solution for 3n+5n=72 equation: 



3n+5n=72

We move all terms to the left:

3n+5n-(72)=0

We add all the numbers together, and all the variables

8n-72=0

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

8n=72

n=72/8

n=9

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