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Simplifying u + 40 = 3u Reorder the terms: 40 + u = 3u Solving 40 + u = 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. 40 + u + -3u = 3u + -3u Combine like terms: u + -3u = -2u 40 + -2u = 3u + -3u Combine like terms: 3u + -3u = 0 40 + -2u = 0 Add '-40' to each side of the equation. 40 + -40 + -2u = 0 + -40 Combine like terms: 40 + -40 = 0 0 + -2u = 0 + -40 -2u = 0 + -40 Combine like terms: 0 + -40 = -40 -2u = -40 Divide each side by '-2'. u = 20 Simplifying u = 20
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