Respuesta :

11)
8/20 = x/26
x = 26*8/20
x = 10.4

y/6 = 12/8
y = 12*6/8
y = 9

12)
x/8=12/15
x = 8*12/15
x = 6.4
10/y = 12/3
10/y = 4
y = 10/4
y = 2.5