27+4r=15

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Solution for 27+4r=15 equation: 



27+4r=15

We move all terms to the left:

27+4r-(15)=0

We add all the numbers together, and all the variables

4r+12=0

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

4r=-12

r=-12/4

r=-3

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