10r+20=2r+12=6r

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Solution for 10r+20=2r+12=6r equation: 



10r+20=2r+12=6r

We move all terms to the left:

10r+20-(2r+12)=0

We get rid of parentheses

10r-2r-12+20=0

We add all the numbers together, and all the variables

8r+8=0

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

8r=-8

r=-8/8

r=-1

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