r/2-2=-1

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Solution for r/2-2=-1 equation: 



r/2-2=-1

We move all terms to the left:

r/2-2-(-1)=0

We add all the numbers together, and all the variables

r/2-1=0

We multiply all the terms by the denominator


r-1*2=0

We add all the numbers together, and all the variables

r-2=0

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

r=2

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