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Simplifying 7u + 9 = 2u + -1 Reorder the terms: 9 + 7u = 2u + -1 Reorder the terms: 9 + 7u = -1 + 2u Solving 9 + 7u = -1 + 2u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-2u' to each side of the equation. 9 + 7u + -2u = -1 + 2u + -2u Combine like terms: 7u + -2u = 5u 9 + 5u = -1 + 2u + -2u Combine like terms: 2u + -2u = 0 9 + 5u = -1 + 0 9 + 5u = -1 Add '-9' to each side of the equation. 9 + -9 + 5u = -1 + -9 Combine like terms: 9 + -9 = 0 0 + 5u = -1 + -9 5u = -1 + -9 Combine like terms: -1 + -9 = -10 5u = -10 Divide each side by '5'. u = -2 Simplifying u = -2
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