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Simplifying 50 = 81 + -1k Solving 50 = 81 + -1k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add 'k' to each side of the equation. 50 + k = 81 + -1k + k Combine like terms: -1k + k = 0 50 + k = 81 + 0 50 + k = 81 Add '-50' to each side of the equation. 50 + -50 + k = 81 + -50 Combine like terms: 50 + -50 = 0 0 + k = 81 + -50 k = 81 + -50 Combine like terms: 81 + -50 = 31 k = 31 Simplifying k = 31
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