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Simplifying 400 = 20k Solving 400 = 20k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-20k' to each side of the equation. 400 + -20k = 20k + -20k Combine like terms: 20k + -20k = 0 400 + -20k = 0 Add '-400' to each side of the equation. 400 + -400 + -20k = 0 + -400 Combine like terms: 400 + -400 = 0 0 + -20k = 0 + -400 -20k = 0 + -400 Combine like terms: 0 + -400 = -400 -20k = -400 Divide each side by '-20'. k = 20 Simplifying k = 20
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