r/2(-9)=15

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Solution for r/2(-9)=15 equation: 



r/2(-9)=15

We move all terms to the left:

r/2(-9)-(15)=0

We multiply all the terms by the denominator


r-15*2(-9)=0

We add all the numbers together, and all the variables

r+270=0

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

r=-270

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