-20=r/12

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Solution for -20=r/12 equation: 



-20=r/12

We move all terms to the left:

-20-(r/12)=0

We add all the numbers together, and all the variables

-(+r/12)-20=0

We get rid of parentheses

-r/12-20=0

We multiply all the terms by the denominator


-r-20*12=0

We add all the numbers together, and all the variables

-1r-240=0

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

-r=240

r=240/-1

r=-240

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