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Simplifying 261 = 81 + -1u Solving 261 = 81 + -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. 261 + u = 81 + -1u + u Combine like terms: -1u + u = 0 261 + u = 81 + 0 261 + u = 81 Add '-261' to each side of the equation. 261 + -261 + u = 81 + -261 Combine like terms: 261 + -261 = 0 0 + u = 81 + -261 u = 81 + -261 Combine like terms: 81 + -261 = -180 u = -180 Simplifying u = -180
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