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Simplifying -20 = 2(u + 5) + -7u Reorder the terms: -20 = 2(5 + u) + -7u -20 = (5 * 2 + u * 2) + -7u -20 = (10 + 2u) + -7u Combine like terms: 2u + -7u = -5u -20 = 10 + -5u Solving -20 = 10 + -5u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '5u' to each side of the equation. -20 + 5u = 10 + -5u + 5u Combine like terms: -5u + 5u = 0 -20 + 5u = 10 + 0 -20 + 5u = 10 Add '20' to each side of the equation. -20 + 20 + 5u = 10 + 20 Combine like terms: -20 + 20 = 0 0 + 5u = 10 + 20 5u = 10 + 20 Combine like terms: 10 + 20 = 30 5u = 30 Divide each side by '5'. u = 6 Simplifying u = 6
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