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Simplifying -2(r + 6) = -31 Reorder the terms: -2(6 + r) = -31 (6 * -2 + r * -2) = -31 (-12 + -2r) = -31 Solving -12 + -2r = -31 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + -2r = -31 + 12 Combine like terms: -12 + 12 = 0 0 + -2r = -31 + 12 -2r = -31 + 12 Combine like terms: -31 + 12 = -19 -2r = -19 Divide each side by '-2'. r = 9.5 Simplifying r = 9.5
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