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Simplifying 8u + u + 7 = u Reorder the terms: 7 + 8u + u = u Combine like terms: 8u + u = 9u 7 + 9u = u Solving 7 + 9u = u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1u' to each side of the equation. 7 + 9u + -1u = u + -1u Combine like terms: 9u + -1u = 8u 7 + 8u = u + -1u Combine like terms: u + -1u = 0 7 + 8u = 0 Add '-7' to each side of the equation. 7 + -7 + 8u = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 8u = 0 + -7 8u = 0 + -7 Combine like terms: 0 + -7 = -7 8u = -7 Divide each side by '8'. u = -0.875 Simplifying u = -0.875
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