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If f(x) = 2x - 6 and g(x) = 3x + 9, find (f - g)(x).
O A. (f- g)(x) = x + 15
B. (f- g)(x) = 5x + 3
C. (f- g)(x) = -x + 3
D. (f- g)(x) =
= -X- 15