Asoda machine can fill 8 bottles in 10 minutes. at the same rate how many machines could fill 48 bottles in half that time?

1 machine -  8 bottles  -  10 minutes
x machines - 48 bottles - 5 minutes

x : 1 = 48 : 8 = 10 : 5
x * 8 * 5 = 48 * 10
40 x = 480
x = 480 : 40
x = 12
Answer : 12 machines.