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Simplifying -2 = 2(u + 8) + -4u Reorder the terms: -2 = 2(8 + u) + -4u -2 = (8 * 2 + u * 2) + -4u -2 = (16 + 2u) + -4u Combine like terms: 2u + -4u = -2u -2 = 16 + -2u Solving -2 = 16 + -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. -2 + 2u = 16 + -2u + 2u Combine like terms: -2u + 2u = 0 -2 + 2u = 16 + 0 -2 + 2u = 16 Add '2' to each side of the equation. -2 + 2 + 2u = 16 + 2 Combine like terms: -2 + 2 = 0 0 + 2u = 16 + 2 2u = 16 + 2 Combine like terms: 16 + 2 = 18 2u = 18 Divide each side by '2'. u = 9 Simplifying u = 9
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