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Simplifying 20k + -15k + 13 = 68 Reorder the terms: 13 + 20k + -15k = 68 Combine like terms: 20k + -15k = 5k 13 + 5k = 68 Solving 13 + 5k = 68 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + 5k = 68 + -13 Combine like terms: 13 + -13 = 0 0 + 5k = 68 + -13 5k = 68 + -13 Combine like terms: 68 + -13 = 55 5k = 55 Divide each side by '5'. k = 11 Simplifying k = 11
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