4r=2(r+10)

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Solution for 4r=2(r+10) equation: 



4r=2(r+10)

We move all terms to the left:

4r-(2(r+10))=0



We calculate terms in parentheses: -(2(r+10)), so:

2(r+10)

We multiply parentheses

2r+20

Back to the equation:

-(2r+20)



We get rid of parentheses

4r-2r-20=0

We add all the numbers together, and all the variables

2r-20=0

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

2r=20

r=20/2

r=10

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