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216=3.6r
We simplify the equation to the form, which is simple to understand
216=3.6r
We move all terms containing r to the left and all other terms to the right.
-3.6r=-216
We simplify left and right side of the equation.
-3.6r=-216
We divide both sides of the equation by -03.6 to get r.
r=60
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