-20.9=-4.2+n

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Solution for -20.9=-4.2+n equation: 



-20.9=-4.2+n

We move all terms to the left:

-20.9-(-4.2+n)=0

We add all the numbers together, and all the variables

-(n-4.2)-20.9=0

We get rid of parentheses

-n+4.2-20.9=0

We add all the numbers together, and all the variables

-1n-16.7=0

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

-n=16.7

n=16.7/-1

n=-16+0.7/1

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