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Simplifying 7u + 85 = 13 + -2u Reorder the terms: 85 + 7u = 13 + -2u Solving 85 + 7u = 13 + -2u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '2u' to each side of the equation. 85 + 7u + 2u = 13 + -2u + 2u Combine like terms: 7u + 2u = 9u 85 + 9u = 13 + -2u + 2u Combine like terms: -2u + 2u = 0 85 + 9u = 13 + 0 85 + 9u = 13 Add '-85' to each side of the equation. 85 + -85 + 9u = 13 + -85 Combine like terms: 85 + -85 = 0 0 + 9u = 13 + -85 9u = 13 + -85 Combine like terms: 13 + -85 = -72 9u = -72 Divide each side by '9'. u = -8 Simplifying u = -8
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