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Simplifying 81 = -7k + -3 Reorder the terms: 81 = -3 + -7k Solving 81 = -3 + -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. 81 + 7k = -3 + -7k + 7k Combine like terms: -7k + 7k = 0 81 + 7k = -3 + 0 81 + 7k = -3 Add '-81' to each side of the equation. 81 + -81 + 7k = -3 + -81 Combine like terms: 81 + -81 = 0 0 + 7k = -3 + -81 7k = -3 + -81 Combine like terms: -3 + -81 = -84 7k = -84 Divide each side by '7'. k = -12 Simplifying k = -12
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