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Simplifying 4k + -13k + -12k = 0 Combine like terms: 4k + -13k = -9k -9k + -12k = 0 Combine like terms: -9k + -12k = -21k -21k = 0 Solving -21k = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Divide each side by '-21'. k = 0 Simplifying k = 0
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