7r+1=99

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Solution for 7r+1=99 equation: 



7r+1=99

We move all terms to the left:

7r+1-(99)=0

We add all the numbers together, and all the variables

7r-98=0

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

7r=98

r=98/7

r=14

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