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Simplifying x2 + -5kx + 4 = 0 Reorder the terms: 4 + -5kx + x2 = 0 Solving 4 + -5kx + x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -5kx + -4 + x2 = 0 + -4 Reorder the terms: 4 + -4 + -5kx + x2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -5kx + x2 = 0 + -4 -5kx + x2 = 0 + -4 Combine like terms: 0 + -4 = -4 -5kx + x2 = -4 Add '-1x2' to each side of the equation. -5kx + x2 + -1x2 = -4 + -1x2 Combine like terms: x2 + -1x2 = 0 -5kx + 0 = -4 + -1x2 -5kx = -4 + -1x2 Divide each side by '-5x'. k = 0.8x-1 + 0.2x Simplifying k = 0.8x-1 + 0.2x
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