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Simplifying 7u + -2u = 3u + 20 Combine like terms: 7u + -2u = 5u 5u = 3u + 20 Reorder the terms: 5u = 20 + 3u Solving 5u = 20 + 3u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-3u' to each side of the equation. 5u + -3u = 20 + 3u + -3u Combine like terms: 5u + -3u = 2u 2u = 20 + 3u + -3u Combine like terms: 3u + -3u = 0 2u = 20 + 0 2u = 20 Divide each side by '2'. u = 10 Simplifying u = 10
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