-12+11r=109

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Solution for -12+11r=109 equation: 



-12+11r=109

We move all terms to the left:

-12+11r-(109)=0

We add all the numbers together, and all the variables

11r-121=0

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

11r=121

r=121/11

r=11

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