12+29r=128

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Solution for 12+29r=128 equation: 



12+29r=128

We move all terms to the left:

12+29r-(128)=0

We add all the numbers together, and all the variables

29r-116=0

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

29r=116

r=116/29

r=4

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