12+8r-20=10r+18

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Solution for 12+8r-20=10r+18 equation: 



12+8r-20=10r+18

We move all terms to the left:

12+8r-20-(10r+18)=0

We add all the numbers together, and all the variables

8r-(10r+18)-8=0

We get rid of parentheses

8r-10r-18-8=0

We add all the numbers together, and all the variables

-2r-26=0

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

-2r=26

r=26/-2

r=-13

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