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-12=r/8-5
We simplify the equation to the form, which is simple to understand
-12=r/8-5
We move all terms containing r to the left and all other terms to the right.
-0.125r=-5+12
We simplify left and right side of the equation.
-0.125r=+7
We divide both sides of the equation by -00.125 to get r.
r=-56
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