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Simplifying 4.2 = -3u + 11.7 Reorder the terms: 4.2 = 11.7 + -3u Solving 4.2 = 11.7 + -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. 4.2 + 3u = 11.7 + -3u + 3u Combine like terms: -3u + 3u = 0 4.2 + 3u = 11.7 + 0 4.2 + 3u = 11.7 Add '-4.2' to each side of the equation. 4.2 + -4.2 + 3u = 11.7 + -4.2 Combine like terms: 4.2 + -4.2 = 0.0 0.0 + 3u = 11.7 + -4.2 3u = 11.7 + -4.2 Combine like terms: 11.7 + -4.2 = 7.5 3u = 7.5 Divide each side by '3'. u = 2.5 Simplifying u = 2.5
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