20-18r=-20-20-8r

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Solution for 20-18r=-20-20-8r equation: 



20-18r=-20-20-8r

We move all terms to the left:

20-18r-(-20-20-8r)=0

We add all the numbers together, and all the variables

-18r-(-8r-40)+20=0

We get rid of parentheses

-18r+8r+40+20=0

We add all the numbers together, and all the variables

-10r+60=0

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

-10r=-60

r=-60/-10

r=+6

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