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Simplifying 5k + 7 = 3k + 15 Reorder the terms: 7 + 5k = 3k + 15 Reorder the terms: 7 + 5k = 15 + 3k Solving 7 + 5k = 15 + 3k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-3k' to each side of the equation. 7 + 5k + -3k = 15 + 3k + -3k Combine like terms: 5k + -3k = 2k 7 + 2k = 15 + 3k + -3k Combine like terms: 3k + -3k = 0 7 + 2k = 15 + 0 7 + 2k = 15 Add '-7' to each side of the equation. 7 + -7 + 2k = 15 + -7 Combine like terms: 7 + -7 = 0 0 + 2k = 15 + -7 2k = 15 + -7 Combine like terms: 15 + -7 = 8 2k = 8 Divide each side by '2'. k = 4 Simplifying k = 4
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