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Simplifying 9(k + 2) = 90 Reorder the terms: 9(2 + k) = 90 (2 * 9 + k * 9) = 90 (18 + 9k) = 90 Solving 18 + 9k = 90 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + 9k = 90 + -18 Combine like terms: 18 + -18 = 0 0 + 9k = 90 + -18 9k = 90 + -18 Combine like terms: 90 + -18 = 72 9k = 72 Divide each side by '9'. k = 8 Simplifying k = 8
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