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Simplifying 7k + -1(-3k) + 8 = 0 Remove parenthesis around (-3k) 7k + -1 * -3k + 8 = 0 Multiply -1 * -3 7k + 3k + 8 = 0 Reorder the terms: 8 + 7k + 3k = 0 Combine like terms: 7k + 3k = 10k 8 + 10k = 0 Solving 8 + 10k = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + 10k = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 10k = 0 + -8 10k = 0 + -8 Combine like terms: 0 + -8 = -8 10k = -8 Divide each side by '10'. k = -0.8 Simplifying k = -0.8
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