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Simplifying 81 = 4u + 17 Reorder the terms: 81 = 17 + 4u Solving 81 = 17 + 4u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-4u' to each side of the equation. 81 + -4u = 17 + 4u + -4u Combine like terms: 4u + -4u = 0 81 + -4u = 17 + 0 81 + -4u = 17 Add '-81' to each side of the equation. 81 + -81 + -4u = 17 + -81 Combine like terms: 81 + -81 = 0 0 + -4u = 17 + -81 -4u = 17 + -81 Combine like terms: 17 + -81 = -64 -4u = -64 Divide each side by '-4'. u = 16 Simplifying u = 16
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