12r-3r-8r-1=3

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Solution for 12r-3r-8r-1=3 equation: 



12r-3r-8r-1=3

We move all terms to the left:

12r-3r-8r-1-(3)=0

We add all the numbers together, and all the variables

r-4=0

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

r=4

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