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Simplifying K + 54 + -9k = 21 Reorder the terms: 54 + K + -9k = 21 Solving 54 + K + -9k = 21 Solving for variable 'K'. Move all terms containing K to the left, all other terms to the right. Add '-54' to each side of the equation. 54 + K + -54 + -9k = 21 + -54 Reorder the terms: 54 + -54 + K + -9k = 21 + -54 Combine like terms: 54 + -54 = 0 0 + K + -9k = 21 + -54 K + -9k = 21 + -54 Combine like terms: 21 + -54 = -33 K + -9k = -33 Add '9k' to each side of the equation. K + -9k + 9k = -33 + 9k Combine like terms: -9k + 9k = 0 K + 0 = -33 + 9k K = -33 + 9k Simplifying K = -33 + 9k
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