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Simplifying 20 + -9k = -7k + 66 Reorder the terms: 20 + -9k = 66 + -7k Solving 20 + -9k = 66 + -7k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '7k' to each side of the equation. 20 + -9k + 7k = 66 + -7k + 7k Combine like terms: -9k + 7k = -2k 20 + -2k = 66 + -7k + 7k Combine like terms: -7k + 7k = 0 20 + -2k = 66 + 0 20 + -2k = 66 Add '-20' to each side of the equation. 20 + -20 + -2k = 66 + -20 Combine like terms: 20 + -20 = 0 0 + -2k = 66 + -20 -2k = 66 + -20 Combine like terms: 66 + -20 = 46 -2k = 46 Divide each side by '-2'. k = -23 Simplifying k = -23
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