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Simplifying -2u + 4(u + 5) = 40 Reorder the terms: -2u + 4(5 + u) = 40 -2u + (5 * 4 + u * 4) = 40 -2u + (20 + 4u) = 40 Reorder the terms: 20 + -2u + 4u = 40 Combine like terms: -2u + 4u = 2u 20 + 2u = 40 Solving 20 + 2u = 40 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 2u = 40 + -20 Combine like terms: 20 + -20 = 0 0 + 2u = 40 + -20 2u = 40 + -20 Combine like terms: 40 + -20 = 20 2u = 20 Divide each side by '2'. u = 10 Simplifying u = 10
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