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36-8r=-4(1+7r)
We simplify the equation to the form, which is simple to understand
36-8r=-4(1+7r)
Reorder the terms in parentheses
36-8r=+(-4-28r)
Remove unnecessary parentheses
+36-8r=-4-28r
We move all terms containing r to the left and all other terms to the right.
-8r+28r=-4-36
We simplify left and right side of the equation.
+20r=-40
We divide both sides of the equation by 20 to get r.
r=-2
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