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
42x = 39 . 42 - 37. 42
Tìm x :
42x + 37 . 42 = 39 .42
tìm x 42x=39×42-37×42
1: (2600 + 6400) - 3x= 1200
2: 42x = 39 . 42 - 37 .42
3: 2x - 138 = 23 . 32
Tim so tu nhien x biet :
A,(2600+6400)-3×x=1200
B,[(6×x-72):2-84].28=5628
C,2x-138=2^3÷3^2
d,42x=39×42-37×42
Dup minh nhe
Tìm số tự nhiên x, biết:
a) (2600 + 6400) - 3 . x = 1200
b) [(6 . x - 72) : 2 -84] . 28 = 5628
c) 2x - 138 = 23 . 32
d) 42x = 39 . 42 - 37 . 42
tìm x :
a) 42x + 37 . 42 = 39 . 42
b) 52x-3 - 2 . 52 = 52 . 3
c) ( x - 6 )2 = 9
d) 15 - 3x = 17 - 9 - 4x
Giúp mình cho 2 like luôn
( 39* 42 - 37* 42) :42
b) (39 . 42 - 37 . 42) : 42