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Simplifying -9 + -30 = -3(u + -2) Combine like terms: -9 + -30 = -39 -39 = -3(u + -2) Reorder the terms: -39 = -3(-2 + u) -39 = (-2 * -3 + u * -3) -39 = (6 + -3u) Solving -39 = 6 + -3u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '3u' to each side of the equation. -39 + 3u = 6 + -3u + 3u Combine like terms: -3u + 3u = 0 -39 + 3u = 6 + 0 -39 + 3u = 6 Add '39' to each side of the equation. -39 + 39 + 3u = 6 + 39 Combine like terms: -39 + 39 = 0 0 + 3u = 6 + 39 3u = 6 + 39 Combine like terms: 6 + 39 = 45 3u = 45 Divide each side by '3'. u = 15 Simplifying u = 15
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