r+7r=3

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Solution for r+7r=3 equation: 



r+7r=3

We move all terms to the left:

r+7r-(3)=0

We add all the numbers together, and all the variables

8r-3=0

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

8r=3

r=3/8

r=3/8

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