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Simplifying -2(u + -5) + -1(u + 1) = -18 Reorder the terms: -2(-5 + u) + -1(u + 1) = -18 (-5 * -2 + u * -2) + -1(u + 1) = -18 (10 + -2u) + -1(u + 1) = -18 Reorder the terms: 10 + -2u + -1(1 + u) = -18 10 + -2u + (1 * -1 + u * -1) = -18 10 + -2u + (-1 + -1u) = -18 Reorder the terms: 10 + -1 + -2u + -1u = -18 Combine like terms: 10 + -1 = 9 9 + -2u + -1u = -18 Combine like terms: -2u + -1u = -3u 9 + -3u = -18 Solving 9 + -3u = -18 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -3u = -18 + -9 Combine like terms: 9 + -9 = 0 0 + -3u = -18 + -9 -3u = -18 + -9 Combine like terms: -18 + -9 = -27 -3u = -27 Divide each side by '-3'. u = 9 Simplifying u = 9
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