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Simplifying fn = 5n2 + 4nf(3) + -9 Reorder the terms for easier multiplication: fn = 5n2 + 4 * 3fn + -9 Multiply 4 * 3 fn = 5n2 + 12fn + -9 Reorder the terms: fn = -9 + 12fn + 5n2 Solving fn = -9 + 12fn + 5n2 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-12fn' to each side of the equation. fn + -12fn = -9 + 12fn + -12fn + 5n2 Combine like terms: fn + -12fn = -11fn -11fn = -9 + 12fn + -12fn + 5n2 Combine like terms: 12fn + -12fn = 0 -11fn = -9 + 0 + 5n2 -11fn = -9 + 5n2 Divide each side by '-11n'. f = 0.8181818182n-1 + -0.4545454545n Simplifying f = 0.8181818182n-1 + -0.4545454545n
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