Respuesta :

ktreyb
m∠BDC = 75°

You find X by setting both angles equal to the total, 134. 

5x + 4 + 7x - 2 = 134
12x + 2 = 134
12x = 132
x = 11

Then plug in 11 to 7x - 2 = 7(11) - 2 = 77 - 2 = 75. 

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