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Simplifying -1(k + -1) = -1 Reorder the terms: -1(-1 + k) = -1 (-1 * -1 + k * -1) = -1 (1 + -1k) = -1 Solving 1 + -1k = -1 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1k = -1 + -1 Combine like terms: 1 + -1 = 0 0 + -1k = -1 + -1 -1k = -1 + -1 Combine like terms: -1 + -1 = -2 -1k = -2 Divide each side by '-1'. k = 2 Simplifying k = 2
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