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Simplifying -30 = 7k + -9 Reorder the terms: -30 = -9 + 7k Solving -30 = -9 + 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. -30 + -7k = -9 + 7k + -7k Combine like terms: 7k + -7k = 0 -30 + -7k = -9 + 0 -30 + -7k = -9 Add '30' to each side of the equation. -30 + 30 + -7k = -9 + 30 Combine like terms: -30 + 30 = 0 0 + -7k = -9 + 30 -7k = -9 + 30 Combine like terms: -9 + 30 = 21 -7k = 21 Divide each side by '-7'. k = -3 Simplifying k = -3
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