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Simplifying 7k + -12 + -4.5k = 18 Reorder the terms: -12 + 7k + -4.5k = 18 Combine like terms: 7k + -4.5k = 2.5k -12 + 2.5k = 18 Solving -12 + 2.5k = 18 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + 2.5k = 18 + 12 Combine like terms: -12 + 12 = 0 0 + 2.5k = 18 + 12 2.5k = 18 + 12 Combine like terms: 18 + 12 = 30 2.5k = 30 Divide each side by '2.5'. k = 12 Simplifying k = 12
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