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-4(1-2r)+4=-64
We simplify the equation to the form, which is simple to understand
-4(1-2r)+4=-64
Reorder the terms in parentheses
+(-4+8r)+4=-64
Remove unnecessary parentheses
-4+8r+4=-64
We move all terms containing r to the left and all other terms to the right.
+8r=-64+4-4
We simplify left and right side of the equation.
+8r=-64
We divide both sides of the equation by 8 to get r.
r=-8
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