47=-20+r

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Solution for 47=-20+r equation: 



47=-20+r

We move all terms to the left:

47-(-20+r)=0

We add all the numbers together, and all the variables

-(r-20)+47=0

We get rid of parentheses

-r+20+47=0

We add all the numbers together, and all the variables

-1r+67=0

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

-r=-67

r=-67/-1

r=+67

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