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Simplifying 45 = -5k + -20 Reorder the terms: 45 = -20 + -5k Solving 45 = -20 + -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. 45 + 5k = -20 + -5k + 5k Combine like terms: -5k + 5k = 0 45 + 5k = -20 + 0 45 + 5k = -20 Add '-45' to each side of the equation. 45 + -45 + 5k = -20 + -45 Combine like terms: 45 + -45 = 0 0 + 5k = -20 + -45 5k = -20 + -45 Combine like terms: -20 + -45 = -65 5k = -65 Divide each side by '5'. k = -13 Simplifying k = -13
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