Respuesta :

Step-by-step explanation:

13y = 20x + 3y

10y = 20x

y = 2x

13(2x) + 8x + 2x = 180

26x + 10x = 180

36x = 180

x = 5

20(5) + 3y = 13y

100 + 3y = 13y

10y = 100

y = 10