Respuesta :

Answer:

40

Step-by-step explanation:

11x+13=90

11x=77

x=7

49-9=40

TREKKER

Answer:

40 degrees

Step-by-step explanation:

QPR + RPS = 90

(7x-9) + (4x+22) = 90

11x + 13 = 90

11x = 77

x = 7 -->

QPR = 7(7) - 9 = 40

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