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Simplifying k + -1[3] = 28 Multiply -1 * 3 k + -3 = 28 Reorder the terms: -3 + k = 28 Solving -3 + k = 28 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + k = 28 + 3 Combine like terms: -3 + 3 = 0 0 + k = 28 + 3 k = 28 + 3 Combine like terms: 28 + 3 = 31 k = 31 Simplifying k = 31
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