12r+9=r-266

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Solution for 12r+9=r-266 equation: 



12r+9=r-266

We move all terms to the left:

12r+9-(r-266)=0

We get rid of parentheses

12r-r+266+9=0

We add all the numbers together, and all the variables

11r+275=0

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

11r=-275

r=-275/11

r=-25

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