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Simplifying 4k + 20 = 9k Reorder the terms: 20 + 4k = 9k Solving 20 + 4k = 9k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-9k' to each side of the equation. 20 + 4k + -9k = 9k + -9k Combine like terms: 4k + -9k = -5k 20 + -5k = 9k + -9k Combine like terms: 9k + -9k = 0 20 + -5k = 0 Add '-20' to each side of the equation. 20 + -20 + -5k = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -5k = 0 + -20 -5k = 0 + -20 Combine like terms: 0 + -20 = -20 -5k = -20 Divide each side by '-5'. k = 4 Simplifying k = 4
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