137=2-9r

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Solution for 137=2-9r equation: 



137=2-9r

We move all terms to the left:

137-(2-9r)=0

We add all the numbers together, and all the variables

-(-9r+2)+137=0

We get rid of parentheses

9r-2+137=0

We add all the numbers together, and all the variables

9r+135=0

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

9r=-135

r=-135/9

r=-15

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