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Simplifying f(13) = 2 * 13 + -3 Reorder the terms for easier multiplication: 13f = 2 * 13 + -3 Multiply 2 * 13 13f = 26 + -3 Combine like terms: 26 + -3 = 23 13f = 23 Solving 13f = 23 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by '13'. f = 1.769230769 Simplifying f = 1.769230769
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