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Simplifying 4 = 2(u + 7) + -4u Reorder the terms: 4 = 2(7 + u) + -4u 4 = (7 * 2 + u * 2) + -4u 4 = (14 + 2u) + -4u Combine like terms: 2u + -4u = -2u 4 = 14 + -2u Solving 4 = 14 + -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. 4 + 2u = 14 + -2u + 2u Combine like terms: -2u + 2u = 0 4 + 2u = 14 + 0 4 + 2u = 14 Add '-4' to each side of the equation. 4 + -4 + 2u = 14 + -4 Combine like terms: 4 + -4 = 0 0 + 2u = 14 + -4 2u = 14 + -4 Combine like terms: 14 + -4 = 10 2u = 10 Divide each side by '2'. u = 5 Simplifying u = 5
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