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Simplifying 28 = 7 + -7k Solving 28 = 7 + -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. 28 + 7k = 7 + -7k + 7k Combine like terms: -7k + 7k = 0 28 + 7k = 7 + 0 28 + 7k = 7 Add '-28' to each side of the equation. 28 + -28 + 7k = 7 + -28 Combine like terms: 28 + -28 = 0 0 + 7k = 7 + -28 7k = 7 + -28 Combine like terms: 7 + -28 = -21 7k = -21 Divide each side by '7'. k = -3 Simplifying k = -3
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