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Simplifying -9k + -11k + -20 = 0 Reorder the terms: -20 + -9k + -11k = 0 Combine like terms: -9k + -11k = -20k -20 + -20k = 0 Solving -20 + -20k = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -20k = 0 + 20 Combine like terms: -20 + 20 = 0 0 + -20k = 0 + 20 -20k = 0 + 20 Combine like terms: 0 + 20 = 20 -20k = 20 Divide each side by '-20'. k = -1 Simplifying k = -1
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