20+5r=-r-20+8r

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Solution for 20+5r=-r-20+8r equation: 



20+5r=-r-20+8r

We move all terms to the left:

20+5r-(-r-20+8r)=0

We add all the numbers together, and all the variables

5r-(7r-20)+20=0

We get rid of parentheses

5r-7r+20+20=0

We add all the numbers together, and all the variables

-2r+40=0

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

-2r=-40

r=-40/-2

r=+20

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