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Simplifying f(x) = 2000(0.9) * x Multiply f * x fx = 2000(0.9) * x Multiply 2000 * 0.9 fx = 1800x Solving fx = 1800x Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = 1800 Simplifying f = 1800
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