r+2=2r-13

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Solution for r+2=2r-13 equation: 



r+2=2r-13

We move all terms to the left:

r+2-(2r-13)=0

We get rid of parentheses

r-2r+13+2=0

We add all the numbers together, and all the variables

-1r+15=0

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

-r=-15

r=-15/-1

r=+15

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