7(r+4)=77

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Solution for 7(r+4)=77 equation: 



7(r+4)=77

We move all terms to the left:

7(r+4)-(77)=0

We multiply parentheses

7r+28-77=0

We add all the numbers together, and all the variables

7r-49=0

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

7r=49

r=49/7

r=7

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