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Simplifying -28 = 2(u + 4) + 2u Reorder the terms: -28 = 2(4 + u) + 2u -28 = (4 * 2 + u * 2) + 2u -28 = (8 + 2u) + 2u Combine like terms: 2u + 2u = 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 = 36 -4u = 36 Divide each side by '-4'. u = -9 Simplifying u = -9
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