Tolong jawab no. 1 secepatnya

x : y = 1/2 : 1/3
x + y = 40
x - y = ?
x = 3/2y
x = 40-y
40-y/y = 3/2
40-y = 3/2y
40 = 5/2y
16 = y
x + 16 = 40
x = 24
jadi x-y = 24-16 = 8

x : y = 1/2 : 1/3

x + y = 40
n/2 + n/3 = 40
3n + 2n = 240
5n = 240
n = 48

x - y
= 48/2 - 48/3
= 24 - 16
= 8