1) 2х*6=5*36
2х *6=180
2х =180÷6
2х =30
х=30÷2
х =15
2)3х *9=54*4
3х *9=216
3х =216÷9
3х =24
х=8
3)3х *21=54*7
3х *21=378
3х =378÷21
3х =18
х=6
4)3х *11=2*33
3х *11=66
3х =66 ÷11
3х =6
х =2
5)4х*5=8*15
4х *5=120
4х =120÷5
4х =24
х=6
6)3х *16=9*64
3х *16=576
3х =576÷16
3х =36
х =12