12r-20=20+4r

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Solution for 12r-20=20+4r equation: 



12r-20=20+4r

We move all terms to the left:

12r-20-(20+4r)=0

We add all the numbers together, and all the variables

12r-(4r+20)-20=0

We get rid of parentheses

12r-4r-20-20=0

We add all the numbers together, and all the variables

8r-40=0

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

8r=40

r=40/8

r=5

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