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Simplifying 3k + 7k + 19 = -81 Reorder the terms: 19 + 3k + 7k = -81 Combine like terms: 3k + 7k = 10k 19 + 10k = -81 Solving 19 + 10k = -81 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-19' to each side of the equation. 19 + -19 + 10k = -81 + -19 Combine like terms: 19 + -19 = 0 0 + 10k = -81 + -19 10k = -81 + -19 Combine like terms: -81 + -19 = -100 10k = -100 Divide each side by '10'. k = -10 Simplifying k = -10
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