-20=-17+r/4

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Solution for -20=-17+r/4 equation: 



-20=-17+r/4

We move all terms to the left:

-20-(-17+r/4)=0

We add all the numbers together, and all the variables

-(r/4-17)-20=0

We get rid of parentheses

-r/4+17-20=0

We multiply all the terms by the denominator


-r+17*4-20*4=0

We add all the numbers together, and all the variables

-1r-12=0

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

-r=12

r=12/-1

r=-12

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