39=7r-3

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Solution for 39=7r-3 equation: 



39=7r-3

We move all terms to the left:

39-(7r-3)=0

We get rid of parentheses

-7r+3+39=0

We add all the numbers together, and all the variables

-7r+42=0

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

-7r=-42

r=-42/-7

r=+6

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