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Simplifying f(5 + 2) = f(5 + 1) + 2f(5) Combine like terms: 5 + 2 = 7 f(7) = f(5 + 1) + 2f(5) Reorder the terms for easier multiplication: 7f = f(5 + 1) + 2f(5) Combine like terms: 5 + 1 = 6 7f = f(6) + 2f(5) Reorder the terms for easier multiplication: 7f = 6f + 2f(5) Reorder the terms for easier multiplication: 7f = 6f + 2 * 5f Multiply 2 * 5 7f = 6f + 10f Combine like terms: 6f + 10f = 16f 7f = 16f Solving 7f = 16f Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-16f' to each side of the equation. 7f + -16f = 16f + -16f Combine like terms: 7f + -16f = -9f -9f = 16f + -16f Combine like terms: 16f + -16f = 0 -9f = 0 Divide each side by '-9'. f = 0 Simplifying f = 0
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