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Simplifying 7u + 15 = u + 12 Reorder the terms: 15 + 7u = u + 12 Reorder the terms: 15 + 7u = 12 + u Solving 15 + 7u = 12 + 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. 15 + 7u + -1u = 12 + u + -1u Combine like terms: 7u + -1u = 6u 15 + 6u = 12 + u + -1u Combine like terms: u + -1u = 0 15 + 6u = 12 + 0 15 + 6u = 12 Add '-15' to each side of the equation. 15 + -15 + 6u = 12 + -15 Combine like terms: 15 + -15 = 0 0 + 6u = 12 + -15 6u = 12 + -15 Combine like terms: 12 + -15 = -3 6u = -3 Divide each side by '6'. u = -0.5 Simplifying u = -0.5
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