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34=3r+9r
We simplify the equation to the form, which is simple to understand
34=3r+9r
We move all terms containing r to the left and all other terms to the right.
-3r-9r=-34
We simplify left and right side of the equation.
-12r=-34
We divide both sides of the equation by -12 to get r.
r=2.83333333333
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