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Simplifying (u + -5) * 2 = 81 Reorder the terms: (-5 + u) * 2 = 81 Reorder the terms for easier multiplication: 2(-5 + u) = 81 (-5 * 2 + u * 2) = 81 (-10 + 2u) = 81 Solving -10 + 2u = 81 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + 2u = 81 + 10 Combine like terms: -10 + 10 = 0 0 + 2u = 81 + 10 2u = 81 + 10 Combine like terms: 81 + 10 = 91 2u = 91 Divide each side by '2'. u = 45.5 Simplifying u = 45.5
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