17=7r-4

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Solution for 17=7r-4 equation: 



17=7r-4

We move all terms to the left:

17-(7r-4)=0

We get rid of parentheses

-7r+4+17=0

We add all the numbers together, and all the variables

-7r+21=0

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

-7r=-21

r=-21/-7

r=+3

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