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Simplifying 30 = 5(u + 4) + 5u Reorder the terms: 30 = 5(4 + u) + 5u 30 = (4 * 5 + u * 5) + 5u 30 = (20 + 5u) + 5u Combine like terms: 5u + 5u = 10u 30 = 20 + 10u Solving 30 = 20 + 10u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-10u' to each side of the equation. 30 + -10u = 20 + 10u + -10u Combine like terms: 10u + -10u = 0 30 + -10u = 20 + 0 30 + -10u = 20 Add '-30' to each side of the equation. 30 + -30 + -10u = 20 + -30 Combine like terms: 30 + -30 = 0 0 + -10u = 20 + -30 -10u = 20 + -30 Combine like terms: 20 + -30 = -10 -10u = -10 Divide each side by '-10'. u = 1 Simplifying u = 1
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