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Simplifying 23 = -7u + (u + -3) Reorder the terms: 23 = -7u + (-3 + u) Remove parenthesis around (-3 + u) 23 = -7u + -3 + u Reorder the terms: 23 = -3 + -7u + u Combine like terms: -7u + u = -6u 23 = -3 + -6u Solving 23 = -3 + -6u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '6u' to each side of the equation. 23 + 6u = -3 + -6u + 6u Combine like terms: -6u + 6u = 0 23 + 6u = -3 + 0 23 + 6u = -3 Add '-23' to each side of the equation. 23 + -23 + 6u = -3 + -23 Combine like terms: 23 + -23 = 0 0 + 6u = -3 + -23 6u = -3 + -23 Combine like terms: -3 + -23 = -26 6u = -26 Divide each side by '6'. u = -4.333333333 Simplifying u = -4.333333333
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