2(r+20)=0.2(20r+40)

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Solution for 2(r+20)=0.2(20r+40) equation: 



2(r+20)=0.2(20r+40)

We move all terms to the left:

2(r+20)-(0.2(20r+40))=0

We multiply parentheses

2r-(0.2(20r+40))+40=0



We calculate terms in parentheses: -(0.2(20r+40)), so:

0.2(20r+40)

We multiply parentheses

4r+8

Back to the equation:

-(4r+8)



We get rid of parentheses

2r-4r-8+40=0

We add all the numbers together, and all the variables

-2r+32=0

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

-2r=-32

r=-32/-2

r=+16

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