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Simplifying -6(k + -7) = 3(1 + -1k) Reorder the terms: -6(-7 + k) = 3(1 + -1k) (-7 * -6 + k * -6) = 3(1 + -1k) (42 + -6k) = 3(1 + -1k) 42 + -6k = (1 * 3 + -1k * 3) 42 + -6k = (3 + -3k) Solving 42 + -6k = 3 + -3k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '3k' to each side of the equation. 42 + -6k + 3k = 3 + -3k + 3k Combine like terms: -6k + 3k = -3k 42 + -3k = 3 + -3k + 3k Combine like terms: -3k + 3k = 0 42 + -3k = 3 + 0 42 + -3k = 3 Add '-42' to each side of the equation. 42 + -42 + -3k = 3 + -42 Combine like terms: 42 + -42 = 0 0 + -3k = 3 + -42 -3k = 3 + -42 Combine like terms: 3 + -42 = -39 -3k = -39 Divide each side by '-3'. k = 13 Simplifying k = 13
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