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Simplifying 20 = 3u + -13 Reorder the terms: 20 = -13 + 3u Solving 20 = -13 + 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. 20 + -3u = -13 + 3u + -3u Combine like terms: 3u + -3u = 0 20 + -3u = -13 + 0 20 + -3u = -13 Add '-20' to each side of the equation. 20 + -20 + -3u = -13 + -20 Combine like terms: 20 + -20 = 0 0 + -3u = -13 + -20 -3u = -13 + -20 Combine like terms: -13 + -20 = -33 -3u = -33 Divide each side by '-3'. u = 11 Simplifying u = 11
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