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Simplifying f(x) = 4x + -6x Multiply f * x fx = 4x + -6x Combine like terms: 4x + -6x = -2x fx = -2x Solving fx = -2x Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = -2 Simplifying f = -2
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