Respuesta :

jaspreetkour
(5x - 2) + (11x - 21) + (9x + 3) = 180
all angles must equal 180

gather like terms
25x + 20 = 180
+20 +20
25x = 200
/25 /25

x = 8

angle d = 38
angle e = 75
angle f = 67

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