3n+4n=20

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Solution for 3n+4n=20 equation: 



3n+4n=20

We move all terms to the left:

3n+4n-(20)=0

We add all the numbers together, and all the variables

7n-20=0

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

7n=20

n=20/7

n=2+6/7

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