r/20=-4

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Solution for r/20=-4 equation: 



r/20=-4

We move all terms to the left:

r/20-(-4)=0

We add all the numbers together, and all the variables

r/20+4=0

We multiply all the terms by the denominator


r+4*20=0

We add all the numbers together, and all the variables

r+80=0

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

r=-80

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