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Simplifying -4(k + 9) = 12 Reorder the terms: -4(9 + k) = 12 (9 * -4 + k * -4) = 12 (-36 + -4k) = 12 Solving -36 + -4k = 12 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '36' to each side of the equation. -36 + 36 + -4k = 12 + 36 Combine like terms: -36 + 36 = 0 0 + -4k = 12 + 36 -4k = 12 + 36 Combine like terms: 12 + 36 = 48 -4k = 48 Divide each side by '-4'. k = -12 Simplifying k = -12
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