r+r+r=6

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Solution for r+r+r=6 equation: 



r+r+r=6

We move all terms to the left:

r+r+r-(6)=0

We add all the numbers together, and all the variables

3r-6=0

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

3r=6

r=6/3

r=2

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