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Simplifying 2[k + -1(3k + 12) + 6] = 2(k + 6) Reorder the terms: 2[k + -1(12 + 3k) + 6] = 2(k + 6) 2[k + (12 * -1 + 3k * -1) + 6] = 2(k + 6) 2[k + (-12 + -3k) + 6] = 2(k + 6) Reorder the terms: 2[-12 + 6 + k + -3k] = 2(k + 6) Combine like terms: -12 + 6 = -6 2[-6 + k + -3k] = 2(k + 6) Combine like terms: k + -3k = -2k 2[-6 + -2k] = 2(k + 6) [-6 * 2 + -2k * 2] = 2(k + 6) [-12 + -4k] = 2(k + 6) Reorder the terms: -12 + -4k = 2(6 + k) -12 + -4k = (6 * 2 + k * 2) -12 + -4k = (12 + 2k) Solving -12 + -4k = 12 + 2k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-2k' to each side of the equation. -12 + -4k + -2k = 12 + 2k + -2k Combine like terms: -4k + -2k = -6k -12 + -6k = 12 + 2k + -2k Combine like terms: 2k + -2k = 0 -12 + -6k = 12 + 0 -12 + -6k = 12 Add '12' to each side of the equation. -12 + 12 + -6k = 12 + 12 Combine like terms: -12 + 12 = 0 0 + -6k = 12 + 12 -6k = 12 + 12 Combine like terms: 12 + 12 = 24 -6k = 24 Divide each side by '-6'. k = -4 Simplifying k = -4
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