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Simplifying 3 = 2(u + 9) Reorder the terms: 3 = 2(9 + u) 3 = (9 * 2 + u * 2) 3 = (18 + 2u) Solving 3 = 18 + 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. 3 + -2u = 18 + 2u + -2u Combine like terms: 2u + -2u = 0 3 + -2u = 18 + 0 3 + -2u = 18 Add '-3' to each side of the equation. 3 + -3 + -2u = 18 + -3 Combine like terms: 3 + -3 = 0 0 + -2u = 18 + -3 -2u = 18 + -3 Combine like terms: 18 + -3 = 15 -2u = 15 Divide each side by '-2'. u = -7.5 Simplifying u = -7.5
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