r/3=-7

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Solution for r/3=-7 equation: 



r/3=-7

We move all terms to the left:

r/3-(-7)=0

We add all the numbers together, and all the variables

r/3+7=0

We multiply all the terms by the denominator


r+7*3=0

We add all the numbers together, and all the variables

r+21=0

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

r=-21

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