r/2=-15

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Solution for r/2=-15 equation: 



r/2=-15

We move all terms to the left:

r/2-(-15)=0

We add all the numbers together, and all the variables

r/2+15=0

We multiply all the terms by the denominator


r+15*2=0

We add all the numbers together, and all the variables

r+30=0

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

r=-30

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