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Simplifying 3k + k + 7 = 12 Reorder the terms: 7 + 3k + k = 12 Combine like terms: 3k + k = 4k 7 + 4k = 12 Solving 7 + 4k = 12 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 4k = 12 + -7 Combine like terms: 7 + -7 = 0 0 + 4k = 12 + -7 4k = 12 + -7 Combine like terms: 12 + -7 = 5 4k = 5 Divide each side by '4'. k = 1.25 Simplifying k = 1.25
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