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Simplifying 21 = k(5) Reorder the terms for easier multiplication: 21 = 5k Solving 21 = 5k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-5k' to each side of the equation. 21 + -5k = 5k + -5k Combine like terms: 5k + -5k = 0 21 + -5k = 0 Add '-21' to each side of the equation. 21 + -21 + -5k = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -5k = 0 + -21 -5k = 0 + -21 Combine like terms: 0 + -21 = -21 -5k = -21 Divide each side by '-5'. k = 4.2 Simplifying k = 4.2
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