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Simplifying 6u + 9 = -3u Reorder the terms: 9 + 6u = -3u Solving 9 + 6u = -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. 9 + 6u + 3u = -3u + 3u Combine like terms: 6u + 3u = 9u 9 + 9u = -3u + 3u Combine like terms: -3u + 3u = 0 9 + 9u = 0 Add '-9' to each side of the equation. 9 + -9 + 9u = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 9u = 0 + -9 9u = 0 + -9 Combine like terms: 0 + -9 = -9 9u = -9 Divide each side by '9'. u = -1 Simplifying u = -1
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