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Simplifying 28 = -8u + 4(u + 2) Reorder the terms: 28 = -8u + 4(2 + u) 28 = -8u + (2 * 4 + u * 4) 28 = -8u + (8 + 4u) Reorder the terms: 28 = 8 + -8u + 4u Combine like terms: -8u + 4u = -4u 28 = 8 + -4u Solving 28 = 8 + -4u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '4u' to each side of the equation. 28 + 4u = 8 + -4u + 4u Combine like terms: -4u + 4u = 0 28 + 4u = 8 + 0 28 + 4u = 8 Add '-28' to each side of the equation. 28 + -28 + 4u = 8 + -28 Combine like terms: 28 + -28 = 0 0 + 4u = 8 + -28 4u = 8 + -28 Combine like terms: 8 + -28 = -20 4u = -20 Divide each side by '4'. u = -5 Simplifying u = -5
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