2(12+2r)=80

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Solution for 2(12+2r)=80 equation: 



2(12+2r)=80

We move all terms to the left:

2(12+2r)-(80)=0

We add all the numbers together, and all the variables

2(2r+12)-80=0

We multiply parentheses

4r+24-80=0

We add all the numbers together, and all the variables

4r-56=0

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

4r=56

r=56/4

r=14

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