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Simplifying 3u + -1w = u + 4w Solving 3u + -1w = u + 4w Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1u' to each side of the equation. 3u + -1u + -1w = u + -1u + 4w Combine like terms: 3u + -1u = 2u 2u + -1w = u + -1u + 4w Combine like terms: u + -1u = 0 2u + -1w = 0 + 4w 2u + -1w = 4w Add 'w' to each side of the equation. 2u + -1w + w = 4w + w Combine like terms: -1w + w = 0 2u + 0 = 4w + w 2u = 4w + w Combine like terms: 4w + w = 5w 2u = 5w Divide each side by '2'. u = 2.5w Simplifying u = 2.5w
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