7r=18+r

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Solution for 7r=18+r equation: 



7r=18+r

We move all terms to the left:

7r-(18+r)=0

We add all the numbers together, and all the variables

7r-(r+18)=0

We get rid of parentheses

7r-r-18=0

We add all the numbers together, and all the variables

6r-18=0

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

6r=18

r=18/6

r=3

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