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Simplifying -20 = 4(-5k + 5) Reorder the terms: -20 = 4(5 + -5k) -20 = (5 * 4 + -5k * 4) -20 = (20 + -20k) Solving -20 = 20 + -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. -20 + 20k = 20 + -20k + 20k Combine like terms: -20k + 20k = 0 -20 + 20k = 20 + 0 -20 + 20k = 20 Add '20' to each side of the equation. -20 + 20 + 20k = 20 + 20 Combine like terms: -20 + 20 = 0 0 + 20k = 20 + 20 20k = 20 + 20 Combine like terms: 20 + 20 = 40 20k = 40 Divide each side by '20'. k = 2 Simplifying k = 2
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