2=r+13

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Solution for 2=r+13 equation: 



2=r+13

We move all terms to the left:

2-(r+13)=0

We get rid of parentheses

-r-13+2=0

We add all the numbers together, and all the variables

-1r-11=0

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

-r=11

r=11/-1

r=-11

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