20=50-n

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Solution for 20=50-n equation: 



20=50-n

We move all terms to the left:

20-(50-n)=0

We add all the numbers together, and all the variables

-(-1n+50)+20=0

We get rid of parentheses

1n-50+20=0

We add all the numbers together, and all the variables

n-30=0

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

n=30

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