2r=-11+15

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Solution for 2r=-11+15 equation: 



2r=-11+15

We move all terms to the left:

2r-(-11+15)=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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