7+n.2=20

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Solution for 7+n.2=20 equation: 



7+n.2=20

We move all terms to the left:

7+n.2-(20)=0

We add all the numbers together, and all the variables

n.2-13=0

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

n.2=13

n=13/1

n=13

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