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Simplifying 2r + -20 = 28 Reorder the terms: -20 + 2r = 28 Solving -20 + 2r = 28 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + 2r = 28 + 20 Combine like terms: -20 + 20 = 0 0 + 2r = 28 + 20 2r = 28 + 20 Combine like terms: 28 + 20 = 48 2r = 48 Divide each side by '2'. r = 24 Simplifying r = 24
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