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