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Simplifying k(x) = -2f(-1x) Multiply k * x kx = -2f(-1x) Remove parenthesis around (-1x) kx = -2f * -1x Reorder the terms for easier multiplication: kx = -2 * -1f * x Multiply -2 * -1 kx = 2f * x Multiply f * x kx = 2fx Solving kx = 2fx Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Divide each side by 'x'. k = 2f Simplifying k = 2f
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