7+7r=98

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Solution for 7+7r=98 equation: 



7+7r=98

We move all terms to the left:

7+7r-(98)=0

We add all the numbers together, and all the variables

7r-91=0

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

7r=91

r=91/7

r=13

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