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-16+3r=56
We simplify the equation to the form, which is simple to understand
-16+3r=56
We move all terms containing r to the left and all other terms to the right.
+3r=+56+16
We simplify left and right side of the equation.
+3r=+72
We divide both sides of the equation by 3 to get r.
r=24
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