12r-8r=56

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Solution for 12r-8r=56 equation: 



12r-8r=56

We move all terms to the left:

12r-8r-(56)=0

We add all the numbers together, and all the variables

4r-56=0

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

4r=56

r=56/4

r=14

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