7(r+1)=84

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Solution for 7(r+1)=84 equation: 



7(r+1)=84

We move all terms to the left:

7(r+1)-(84)=0

We multiply parentheses

7r+7-84=0

We add all the numbers together, and all the variables

7r-77=0

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

7r=77

r=77/7

r=11

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