3(4+4r)-4=80

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Solution for 3(4+4r)-4=80 equation: 



3(4+4r)-4=80

We move all terms to the left:

3(4+4r)-4-(80)=0

We add all the numbers together, and all the variables

3(4r+4)-4-80=0

We add all the numbers together, and all the variables

3(4r+4)-84=0

We multiply parentheses

12r+12-84=0

We add all the numbers together, and all the variables

12r-72=0

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

12r=72

r=72/12

r=6

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