-15-2r+1=-18

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Solution for -15-2r+1=-18 equation: 



-15-2r+1=-18

We move all terms to the left:

-15-2r+1-(-18)=0

We add all the numbers together, and all the variables

-2r+4=0

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

-2r=-4

r=-4/-2

r=+2

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