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Simplifying 9u + -39 = 3(u + 5) Reorder the terms: -39 + 9u = 3(u + 5) Reorder the terms: -39 + 9u = 3(5 + u) -39 + 9u = (5 * 3 + u * 3) -39 + 9u = (15 + 3u) Solving -39 + 9u = 15 + 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 + 9u + -3u = 15 + 3u + -3u Combine like terms: 9u + -3u = 6u -39 + 6u = 15 + 3u + -3u Combine like terms: 3u + -3u = 0 -39 + 6u = 15 + 0 -39 + 6u = 15 Add '39' to each side of the equation. -39 + 39 + 6u = 15 + 39 Combine like terms: -39 + 39 = 0 0 + 6u = 15 + 39 6u = 15 + 39 Combine like terms: 15 + 39 = 54 6u = 54 Divide each side by '6'. u = 9 Simplifying u = 9
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