a) x * 6 = 72 - 18
x * 6 = 54
x = 54 : 6
x = 9
b) 48 : x = 36 : 6
48 : x = 6
x = 48 : 6
x = 8
c) x * 9 = 108 : 2
x * 9 = 54
x = 54 : 9
x = 6
a,x.6=72-18
x.6=54
x =54:6
x =9
b,48:x=36:6
48:x =6
x =48:6
x =8
c,x.9=108:2
x.9 =54
x =54:9
x =6
d,x:7=28.2
x:7=56
x =56x7
x =392