tolong ya, pke cara makasiiiih

1. 9/x = 3/7
9.7 = 3x
63 = 3x
x = 63/3
x = 21

2. 2/4 = 4/y
2y = 4.4
2y = 16
y = 16/2
y = 8

4/8 = 3/x
4x = 8.3
4x = 24
x = 24/4
x = 6

Catatan:
. itu perkalian
/ itu pembagian

Maaf jika ada kesalahan.