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Simplifying x + -1u = u Reorder the terms: -1u + x = u Solving -1u + x = 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. -1u + -1u + x = u + -1u Combine like terms: -1u + -1u = -2u -2u + x = u + -1u Combine like terms: u + -1u = 0 -2u + x = 0 Add '-1x' to each side of the equation. -2u + x + -1x = 0 + -1x Combine like terms: x + -1x = 0 -2u + 0 = 0 + -1x -2u = 0 + -1x Remove the zero: -2u = -1x Divide each side by '-2'. u = 0.5x Simplifying u = 0.5x
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