42x = 39.42-37.42
42x = (39-37).42
42x = 2.42
x = 2
42.x=39.42-37.42
Suy ra:42.x=42.(39-37)
Suy ra:42.x=42.2
Suy ra:x=2
Vậy x =2
Tick nha
ta co : 42x=39.42 - 37.42 =(39-37).42 =2.42 =>x=2
42x= 39.42-37.42
42x= 84
x= 84: 42
x= 2
vậy x=2
42x=39.42-37.42
42x=42.(39-37)
42x=42.2
42x=84
x=84:42
x=2
= [39-37]nhan 42chia 42
= 2.[42chia 42]
=2.1=2
