7r+11=81

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Solution for 7r+11=81 equation: 



7r+11=81

We move all terms to the left:

7r+11-(81)=0

We add all the numbers together, and all the variables

7r-70=0

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

7r=70

r=70/7

r=10

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