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Simplifying -9(k + 25) = 72 Reorder the terms: -9(25 + k) = 72 (25 * -9 + k * -9) = 72 (-225 + -9k) = 72 Solving -225 + -9k = 72 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '225' to each side of the equation. -225 + 225 + -9k = 72 + 225 Combine like terms: -225 + 225 = 0 0 + -9k = 72 + 225 -9k = 72 + 225 Combine like terms: 72 + 225 = 297 -9k = 297 Divide each side by '-9'. k = -33 Simplifying k = -33
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