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Simplifying -4 = -9k + -20 + -15k Reorder the terms: -4 = -20 + -9k + -15k Combine like terms: -9k + -15k = -24k -4 = -20 + -24k Solving -4 = -20 + -24k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '24k' to each side of the equation. -4 + 24k = -20 + -24k + 24k Combine like terms: -24k + 24k = 0 -4 + 24k = -20 + 0 -4 + 24k = -20 Add '4' to each side of the equation. -4 + 4 + 24k = -20 + 4 Combine like terms: -4 + 4 = 0 0 + 24k = -20 + 4 24k = -20 + 4 Combine like terms: -20 + 4 = -16 24k = -16 Divide each side by '24'. k = -0.6666666667 Simplifying k = -0.6666666667
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