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Simplifying -2(r + 8) = -25 Reorder the terms: -2(8 + r) = -25 (8 * -2 + r * -2) = -25 (-16 + -2r) = -25 Solving -16 + -2r = -25 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 = -25 + 16 Combine like terms: -16 + 16 = 0 0 + -2r = -25 + 16 -2r = -25 + 16 Combine like terms: -25 + 16 = -9 -2r = -9 Divide each side by '-2'. r = 4.5 Simplifying r = 4.5
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