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Simplifying -1 = 0.4k + 2 Reorder the terms: -1 = 2 + 0.4k Solving -1 = 2 + 0.4k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.4k' to each side of the equation. -1 + -0.4k = 2 + 0.4k + -0.4k Combine like terms: 0.4k + -0.4k = 0.0 -1 + -0.4k = 2 + 0.0 -1 + -0.4k = 2 Add '1' to each side of the equation. -1 + 1 + -0.4k = 2 + 1 Combine like terms: -1 + 1 = 0 0 + -0.4k = 2 + 1 -0.4k = 2 + 1 Combine like terms: 2 + 1 = 3 -0.4k = 3 Divide each side by '-0.4'. k = -7.5 Simplifying k = -7.5
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