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Simplifying 2k + 5 = 21 Reorder the terms: 5 + 2k = 21 Solving 5 + 2k = 21 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 2k = 21 + -5 Combine like terms: 5 + -5 = 0 0 + 2k = 21 + -5 2k = 21 + -5 Combine like terms: 21 + -5 = 16 2k = 16 Divide each side by '2'. k = 8 Simplifying k = 8
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