12 * х = 60
х = 60 : 12
х = 5
12 * 5 = 60
60 = 60
12 : х = 4
х = 12 : 4
х = 3
12 : 3 = 4
4 = 4
60 : х = 15
х = 60 : 15
х = 4
60 : 4 = 15
15 = 15
60 : х = 12
х = 60 : 12
х = 5
60 : 5 = 12
12 = 12
х * 4 = 60
х = 60 : 4
х = 15
15 * 4 = 60
60 = 60
12x=60
x=60/12
x=5
