Respuesta :

Answer: ∠p = 85; ∠Q = 72; ∠R = 23

have: m∠P + m∠Q + m∠R = 180°

=> 4x - 7 + 3x + 3 + x = 180°

⇔ 8x - 4 = 180

⇔ x = (180 + 4)/8

⇔ x = 23

=> m∠P = 4.23 - 7 = 85°

m∠R = 23°

m∠Q = 3.23 + 3 = 72°

Step-by-step explanation:

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