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Simplifying 4.2 = 0.8k Solving 4.2 = 0.8k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.8k' to each side of the equation. 4.2 + -0.8k = 0.8k + -0.8k Combine like terms: 0.8k + -0.8k = 0.0 4.2 + -0.8k = 0.0 Add '-4.2' to each side of the equation. 4.2 + -4.2 + -0.8k = 0.0 + -4.2 Combine like terms: 4.2 + -4.2 = 0.0 0.0 + -0.8k = 0.0 + -4.2 -0.8k = 0.0 + -4.2 Combine like terms: 0.0 + -4.2 = -4.2 -0.8k = -4.2 Divide each side by '-0.8'. k = 5.25 Simplifying k = 5.25
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