a) x.5 + 10 = 20
x.5 = 20 - 10
x.5 = 10
x = 10 : 5
x = 2
b) x:5 + 11 = 66
x : 5 = 66 - 11
x : 5 = 55
x = 55 x 5
x = 275
~ mk nhanh nhất ~
a)x . 5 + 10 = 20
x . 5 = 20 - 10
x . 5 = 10
x = 10 : 5
x = 5
b) x : 5 + 11 = 66
x : 5 = 66 - 11
x : 5 = 55
x = 55 : 5
x = 11
a) x.5+10=20
x.5 =20-10
x.5 =10
x = 10:5
x = 2
b) x:5+11=66
x:5 =66-11
x:5 =55
x =55x5
x = 275