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Simplifying 20k + 20 = -20 + 18k Reorder the terms: 20 + 20k = -20 + 18k Solving 20 + 20k = -20 + 18k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-18k' to each side of the equation. 20 + 20k + -18k = -20 + 18k + -18k Combine like terms: 20k + -18k = 2k 20 + 2k = -20 + 18k + -18k Combine like terms: 18k + -18k = 0 20 + 2k = -20 + 0 20 + 2k = -20 Add '-20' to each side of the equation. 20 + -20 + 2k = -20 + -20 Combine like terms: 20 + -20 = 0 0 + 2k = -20 + -20 2k = -20 + -20 Combine like terms: -20 + -20 = -40 2k = -40 Divide each side by '2'. k = -20 Simplifying k = -20
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