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Simplifying 5u = 42 + -1u Solving 5u = 42 + -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. 5u + u = 42 + -1u + u Combine like terms: 5u + u = 6u 6u = 42 + -1u + u Combine like terms: -1u + u = 0 6u = 42 + 0 6u = 42 Divide each side by '6'. u = 7 Simplifying u = 7
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