Respuesta :

prasamsharayamajhi

Answer:

[tex]25x + 57 + x = 45x(sum \: of \: two \: opposite \:interior \: angles \: is \: equal \: to \: exterior \: ange)\\ 26x + 57 = 45x \\ 57 = 45x - 26x \\ 57 = 19x \\ \frac{57}{19} = x \\ x = 3[/tex]

swipe on solution for full explanation