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Simplifying u + 9 = -7u + 7 Reorder the terms: 9 + u = -7u + 7 Reorder the terms: 9 + u = 7 + -7u Solving 9 + u = 7 + -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. 9 + u + 7u = 7 + -7u + 7u Combine like terms: u + 7u = 8u 9 + 8u = 7 + -7u + 7u Combine like terms: -7u + 7u = 0 9 + 8u = 7 + 0 9 + 8u = 7 Add '-9' to each side of the equation. 9 + -9 + 8u = 7 + -9 Combine like terms: 9 + -9 = 0 0 + 8u = 7 + -9 8u = 7 + -9 Combine like terms: 7 + -9 = -2 8u = -2 Divide each side by '8'. u = -0.25 Simplifying u = -0.25
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