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Simplifying 21 = -14u + -18 Reorder the terms: 21 = -18 + -14u Solving 21 = -18 + -14u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '14u' to each side of the equation. 21 + 14u = -18 + -14u + 14u Combine like terms: -14u + 14u = 0 21 + 14u = -18 + 0 21 + 14u = -18 Add '-21' to each side of the equation. 21 + -21 + 14u = -18 + -21 Combine like terms: 21 + -21 = 0 0 + 14u = -18 + -21 14u = -18 + -21 Combine like terms: -18 + -21 = -39 14u = -39 Divide each side by '14'. u = -2.785714286 Simplifying u = -2.785714286
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