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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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