-47.8=-20.8+r

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Solution for -47.8=-20.8+r equation: 



-47.8=-20.8+r

We move all terms to the left:

-47.8-(-20.8+r)=0

We add all the numbers together, and all the variables

-(r-20.8)-47.8=0

We get rid of parentheses

-r+20.8-47.8=0

We add all the numbers together, and all the variables

-1r-27=0

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

-r=27

r=27/-1

r=-27

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