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Simplifying -3(r + 2) = -31 Reorder the terms: -3(2 + r) = -31 (2 * -3 + r * -3) = -31 (-6 + -3r) = -31 Solving -6 + -3r = -31 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -3r = -31 + 6 Combine like terms: -6 + 6 = 0 0 + -3r = -31 + 6 -3r = -31 + 6 Combine like terms: -31 + 6 = -25 -3r = -25 Divide each side by '-3'. r = 8.333333333 Simplifying r = 8.333333333
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