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Respuesta :

Answer:

x = 26

Step-by-step explanation:

90 + 52 + unknown angle = 180

142 + unknown angle = 180

unknown angle = 38

unknown angle + 116 + x = 180

38 + 116 + x = 180

154 + x = 180

x = 26

santuy

Step-by-step explanation:

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