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Simplifying (r + -5) * 2 = 0 Reorder the terms: (-5 + r) * 2 = 0 Reorder the terms for easier multiplication: 2(-5 + r) = 0 (-5 * 2 + r * 2) = 0 (-10 + 2r) = 0 Solving -10 + 2r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + 2r = 0 + 10 Combine like terms: -10 + 10 = 0 0 + 2r = 0 + 10 2r = 0 + 10 Combine like terms: 0 + 10 = 10 2r = 10 Divide each side by '2'. r = 5 Simplifying r = 5
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