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Simplifying 2r + -4 = -72 Reorder the terms: -4 + 2r = -72 Solving -4 + 2r = -72 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 2r = -72 + 4 Combine like terms: -4 + 4 = 0 0 + 2r = -72 + 4 2r = -72 + 4 Combine like terms: -72 + 4 = -68 2r = -68 Divide each side by '2'. r = -34 Simplifying r = -34
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