12r+20=18r-10

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Solution for 12r+20=18r-10 equation: 



12r+20=18r-10

We move all terms to the left:

12r+20-(18r-10)=0

We get rid of parentheses

12r-18r+10+20=0

We add all the numbers together, and all the variables

-6r+30=0

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

-6r=-30

r=-30/-6

r=+5

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