7r-9=72

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Solution for 7r-9=72 equation: 



7r-9=72

We move all terms to the left:

7r-9-(72)=0

We add all the numbers together, and all the variables

7r-81=0

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

7r=81

r=81/7

r=11+4/7

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