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Simplifying f(x + 9) = x2 + -4x + -7 Reorder the terms: f(9 + x) = x2 + -4x + -7 (9 * f + x * f) = x2 + -4x + -7 (9f + fx) = x2 + -4x + -7 Reorder the terms: 9f + fx = -7 + -4x + x2 Solving 9f + fx = -7 + -4x + x2 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Reorder the terms: 7 + 9f + fx + 4x + -1x2 = -7 + -4x + x2 + 7 + 4x + -1x2 Reorder the terms: 7 + 9f + fx + 4x + -1x2 = -7 + 7 + -4x + 4x + x2 + -1x2 Combine like terms: -7 + 7 = 0 7 + 9f + fx + 4x + -1x2 = 0 + -4x + 4x + x2 + -1x2 7 + 9f + fx + 4x + -1x2 = -4x + 4x + x2 + -1x2 Combine like terms: -4x + 4x = 0 7 + 9f + fx + 4x + -1x2 = 0 + x2 + -1x2 7 + 9f + fx + 4x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 7 + 9f + fx + 4x + -1x2 = 0 The solution to this equation could not be determined.
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