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Simplifying -2(r + 5) = 31 Reorder the terms: -2(5 + r) = 31 (5 * -2 + r * -2) = 31 (-10 + -2r) = 31 Solving -10 + -2r = 31 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 = 31 + 10 Combine like terms: -10 + 10 = 0 0 + -2r = 31 + 10 -2r = 31 + 10 Combine like terms: 31 + 10 = 41 -2r = 41 Divide each side by '-2'. r = -20.5 Simplifying r = -20.5
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