Respuesta :

3x+15x = 180
18x = 180
    x = 10

10(x+y) + 3x = 180
10x + 10y + 3x = 180
13x + 10y = 180
13(10) + 10y = 180
130 + 10y = 180
10y = 50
    y = 5
The value of X = 10 and y = 5