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Simplifying -14u + 7 + 3u = 7u + 21 Reorder the terms: 7 + -14u + 3u = 7u + 21 Combine like terms: -14u + 3u = -11u 7 + -11u = 7u + 21 Reorder the terms: 7 + -11u = 21 + 7u Solving 7 + -11u = 21 + 7u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-7u' to each side of the equation. 7 + -11u + -7u = 21 + 7u + -7u Combine like terms: -11u + -7u = -18u 7 + -18u = 21 + 7u + -7u Combine like terms: 7u + -7u = 0 7 + -18u = 21 + 0 7 + -18u = 21 Add '-7' to each side of the equation. 7 + -7 + -18u = 21 + -7 Combine like terms: 7 + -7 = 0 0 + -18u = 21 + -7 -18u = 21 + -7 Combine like terms: 21 + -7 = 14 -18u = 14 Divide each side by '-18'. u = -0.7777777778 Simplifying u = -0.7777777778
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