Question

х:8=37-21 54-х=72:8 39:х=60:20

Answer 1

х:8=37-21
х:8=16
х=128

54-х=72:8
54-х=9
х=45

39:х=60:20
39:х=3
х=13

Answer 2

х:8=37-21
х:8=16
х=16*8
х=128
.........................
54-х=72:8
54-х=9
х=54-9
х=45
..................
39:х=60:20
39:х=3
х=39:3
х=13