7(r+3)=84

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Solution for 7(r+3)=84 equation: 



7(r+3)=84

We move all terms to the left:

7(r+3)-(84)=0

We multiply parentheses

7r+21-84=0

We add all the numbers together, and all the variables

7r-63=0

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

7r=63

r=63/7

r=9

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