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Simplifying 3k + 8 + 4k + 7 = 0 Reorder the terms: 8 + 7 + 3k + 4k = 0 Combine like terms: 8 + 7 = 15 15 + 3k + 4k = 0 Combine like terms: 3k + 4k = 7k 15 + 7k = 0 Solving 15 + 7k = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 7k = 0 + -15 Combine like terms: 15 + -15 = 0 0 + 7k = 0 + -15 7k = 0 + -15 Combine like terms: 0 + -15 = -15 7k = -15 Divide each side by '7'. k = -2.142857143 Simplifying k = -2.142857143
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