20-2r=-6r-20+12r

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



20-2r=-6r-20+12r

We move all terms to the left:

20-2r-(-6r-20+12r)=0

We add all the numbers together, and all the variables

-2r-(6r-20)+20=0

We get rid of parentheses

-2r-6r+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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