Join the IDNLearn.com community and start getting the answers you need today. Discover detailed and accurate answers to your questions from our knowledgeable and dedicated community members.

In triangle DEF, if m∠D = (2x)°, m∠E = (2x − 4)°, and m∠F = (x + 9)°, what is the value of x?

A: 35
B: 37
C: 44
D: 71