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Simplifying u + 87 = 9u + 7 Reorder the terms: 87 + u = 9u + 7 Reorder the terms: 87 + u = 7 + 9u Solving 87 + u = 7 + 9u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-9u' to each side of the equation. 87 + u + -9u = 7 + 9u + -9u Combine like terms: u + -9u = -8u 87 + -8u = 7 + 9u + -9u Combine like terms: 9u + -9u = 0 87 + -8u = 7 + 0 87 + -8u = 7 Add '-87' to each side of the equation. 87 + -87 + -8u = 7 + -87 Combine like terms: 87 + -87 = 0 0 + -8u = 7 + -87 -8u = 7 + -87 Combine like terms: 7 + -87 = -80 -8u = -80 Divide each side by '-8'. u = 10 Simplifying u = 10
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