Find the measure of each unknown angle in triangle ABC.
?A = (49 - x)°, ?B = (9x - 39)°
A. ?A = 39°, ?B = 51°
B. ?A = ?B = 45°
C. ?A = 33°, ?B = 57°
D. ?A = 43°, ?B = 47°
Answer: A
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