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Simplifying (r + 8)(-2) = 12 Reorder the terms: (8 + r)(-2) = 12 Reorder the terms for easier multiplication: -2(8 + r) = 12 (8 * -2 + r * -2) = 12 (-16 + -2r) = 12 Solving -16 + -2r = 12 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + -2r = 12 + 16 Combine like terms: -16 + 16 = 0 0 + -2r = 12 + 16 -2r = 12 + 16 Combine like terms: 12 + 16 = 28 -2r = 28 Divide each side by '-2'. r = -14 Simplifying r = -14
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