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Simplifying f(x) = (x + -4) + -9 Multiply f * x fx = (x + -4) + -9 Reorder the terms: fx = (-4 + x) + -9 Remove parenthesis around (-4 + x) fx = -4 + x + -9 Reorder the terms: fx = -4 + -9 + x Combine like terms: -4 + -9 = -13 fx = -13 + x Solving fx = -13 + x Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = -13x-1 + 1 Simplifying f = -13x-1 + 1 Reorder the terms: f = 1 + -13x-1
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