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Simplifying -18 = -2(8 + k) -18 = (8 * -2 + k * -2) -18 = (-16 + -2k) Solving -18 = -16 + -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. -18 + 2k = -16 + -2k + 2k Combine like terms: -2k + 2k = 0 -18 + 2k = -16 + 0 -18 + 2k = -16 Add '18' to each side of the equation. -18 + 18 + 2k = -16 + 18 Combine like terms: -18 + 18 = 0 0 + 2k = -16 + 18 2k = -16 + 18 Combine like terms: -16 + 18 = 2 2k = 2 Divide each side by '2'. k = 1 Simplifying k = 1
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