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Simplifying -21 + -6k = -3 Solving -21 + -6k = -3 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + -6k = -3 + 21 Combine like terms: -21 + 21 = 0 0 + -6k = -3 + 21 -6k = -3 + 21 Combine like terms: -3 + 21 = 18 -6k = 18 Divide each side by '-6'. k = -3 Simplifying k = -3
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