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Simplifying 3u + 4(1 + 7u) + 8u = 0 3u + (1 * 4 + 7u * 4) + 8u = 0 3u + (4 + 28u) + 8u = 0 Reorder the terms: 4 + 3u + 28u + 8u = 0 Combine like terms: 3u + 28u = 31u 4 + 31u + 8u = 0 Combine like terms: 31u + 8u = 39u 4 + 39u = 0 Solving 4 + 39u = 0 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 39u = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 39u = 0 + -4 39u = 0 + -4 Combine like terms: 0 + -4 = -4 39u = -4 Divide each side by '39'. u = -0.1025641026 Simplifying u = -0.1025641026
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