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6+r/3=9
We simplify the equation to the form, which is simple to understand
6+r/3=9
We move all terms containing r to the left and all other terms to the right.
+ 0.33333333333333r=+9-6
We simplify left and right side of the equation.
+ 0.33333333333333r=+3
We divide both sides of the equation by 0.33333333333333 to get r.
r=9
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