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Simplifying 15 = 9 + 2k Solving 15 = 9 + 2k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-2k' to each side of the equation. 15 + -2k = 9 + 2k + -2k Combine like terms: 2k + -2k = 0 15 + -2k = 9 + 0 15 + -2k = 9 Add '-15' to each side of the equation. 15 + -15 + -2k = 9 + -15 Combine like terms: 15 + -15 = 0 0 + -2k = 9 + -15 -2k = 9 + -15 Combine like terms: 9 + -15 = -6 -2k = -6 Divide each side by '-2'. k = 3 Simplifying k = 3
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