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Simplifying u + 39 = 4u Reorder the terms: 39 + u = 4u Solving 39 + u = 4u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-4u' to each side of the equation. 39 + u + -4u = 4u + -4u Combine like terms: u + -4u = -3u 39 + -3u = 4u + -4u Combine like terms: 4u + -4u = 0 39 + -3u = 0 Add '-39' to each side of the equation. 39 + -39 + -3u = 0 + -39 Combine like terms: 39 + -39 = 0 0 + -3u = 0 + -39 -3u = 0 + -39 Combine like terms: 0 + -39 = -39 -3u = -39 Divide each side by '-3'. u = 13 Simplifying u = 13
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