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Simplifying 4u + -15 = 5u + 12 Reorder the terms: -15 + 4u = 5u + 12 Reorder the terms: -15 + 4u = 12 + 5u Solving -15 + 4u = 12 + 5u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-5u' to each side of the equation. -15 + 4u + -5u = 12 + 5u + -5u Combine like terms: 4u + -5u = -1u -15 + -1u = 12 + 5u + -5u Combine like terms: 5u + -5u = 0 -15 + -1u = 12 + 0 -15 + -1u = 12 Add '15' to each side of the equation. -15 + 15 + -1u = 12 + 15 Combine like terms: -15 + 15 = 0 0 + -1u = 12 + 15 -1u = 12 + 15 Combine like terms: 12 + 15 = 27 -1u = 27 Divide each side by '-1'. u = -27 Simplifying u = -27
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