2(2r+2)=20

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



2(2r+2)=20

We move all terms to the left:

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

We multiply parentheses

4r+4-20=0

We add all the numbers together, and all the variables

4r-16=0

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

4r=16

r=16/4

r=4

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