Respuesta :

Answer:


Explanation:

triangle:

180(3-2) = 180

180 - (50+90) = 40

x finding:

2x - 10 = 140

2x = 150

x = 75

check:

2(75) - 10 = 140

140 + 40 = 180

Your answer:

x = 75

angle: 140

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