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Simplifying 20 + -1u = 217 Solving 20 + -1u = 217 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -1u = 217 + -20 Combine like terms: 20 + -20 = 0 0 + -1u = 217 + -20 -1u = 217 + -20 Combine like terms: 217 + -20 = 197 -1u = 197 Divide each side by '-1'. u = -197 Simplifying u = -197
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