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Simplifying (-1 + 4u) = u + 15 Remove parenthesis around (-1 + 4u) -1 + 4u = u + 15 Reorder the terms: -1 + 4u = 15 + u Solving -1 + 4u = 15 + u 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. -1 + 4u + -1u = 15 + u + -1u Combine like terms: 4u + -1u = 3u -1 + 3u = 15 + u + -1u Combine like terms: u + -1u = 0 -1 + 3u = 15 + 0 -1 + 3u = 15 Add '1' to each side of the equation. -1 + 1 + 3u = 15 + 1 Combine like terms: -1 + 1 = 0 0 + 3u = 15 + 1 3u = 15 + 1 Combine like terms: 15 + 1 = 16 3u = 16 Divide each side by '3'. u = 5.333333333 Simplifying u = 5.333333333
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