r=40+8r

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Solution for r=40+8r equation: 



r=40+8r

We move all terms to the left:

r-(40+8r)=0

We add all the numbers together, and all the variables

r-(8r+40)=0

We get rid of parentheses

r-8r-40=0

We add all the numbers together, and all the variables

-7r-40=0

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

-7r=40

r=40/-7

r=-5+5/7

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