n-7,n=20

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Solution for n-7,n=20 equation: 



n-7.n=20

We move all terms to the left:

n-7.n-(20)=0

We add all the numbers together, and all the variables

-6n-20=0

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

-6n=20

n=20/-6

n=-3+1/3

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