12(12+2r)=20^2

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Solution for 12(12+2r)=20^2 equation: 



12(12+2r)=20^2

We move all terms to the left:

12(12+2r)-(20^2)=0

We add all the numbers together, and all the variables

12(2r+12)-20^2=0

We add all the numbers together, and all the variables

12(2r+12)-400=0

We multiply parentheses

24r+144-400=0

We add all the numbers together, and all the variables

24r-256=0

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

24r=256

r=256/24

r=10+2/3

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