b) (39 . 42 - 37 . 42) : 42
( 39* 42 - 37* 42) :42
\(\left(39\times42-37\times42\right):42\)
\(=\left[42\left(39-37\right)\right]:42\)
\(=42.2:42=84:42\)
\(=2\)
\(\left(39\cdot42-37\cdot42\right)\text{ : }42\)
\(=\left[42\left(39-37\right)\right]\text{ : }42\)
\(=\left[42\cdot2\right]\text{: }42\)
\(=84\text{ : }42\)
\(=2\)
\(\left(39\cdot42-37\cdot42\right)\text{ : }42\)
\(=\left[42\left(39-37\right)\right]\text{ : }42\)
\(=\left[42\cdot2\right]\text{: }42\)
\(=84\text{ : }42\)
\(=2\)
. Giải nhanh dùm
42 . x = 39 . 42 - 37. 42
42 . x = 39 . 42 - 37. 42
=> 42x=42.(39-37)
=> 42x=42.2
=> x=2
\(42x=39.42-37.42\)
\(42x=42\left(39-37\right)\)
\(42x=42.2\)
\(x=2\) ( chia ca 2 ve cho 42 )
vay \(x=2\)
\(42.x=39.42-37.42\)
\(42.x=42.\left(39-37\right)\)
\(x=39-37\)
\(x=2\)
42x = 39 . 42 - 37. 42
Bài làm
42x = 39 . 42 - 37 . 42
42x = 42. ( 39 - 37 )
42x = 42. 2
42x = 84
x = 84 : 42
x = 2
Vậy x = 2
# Chúc bạn học tốt #
42x = 39 . 42 - 37. 42
42x = (39-37).42
42x =2.42
42x =84
x=84:42=2
a) 36 : 32 + 23 . 22
b) (39 . 42 - 37 . 42) : 42
a) 36 : 32 + 23 . 22
= 36 - 2 + 8 . 22
= 34 + 176 = 257
b) (39 . 42 - 37 . 42) : 42
= [42 . (39 - 37)] : 42
= 42 . 2 : 42
= 2
a)36:32+23.22=34+176=257
b)(39.42-37.42):42=42(39-37):42=39-37=2
(39×42-37×42):42
Giúp mk nha
( 39 . 42 - 37 . 42) : 42
= [ 42 . ( 39 - 37) ] : 42
= [ 42 . 2 ] : 42
= 84 : 42
= 2
^^ Cbht!!!
Thực hiện phép tính
A 3^6 :3^3 +2^3 × 2^2
B ( 39 × 42 -37 ×42 ) :42
42x = 39. 42- 37. 42
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
Tìm x :
42x + 37 . 42 = 39 .42
42x+37.42=39.42
42x=39.42-37.42
42x=42.2
=> x=2
42x + 37 . 42 = 39 .42
42x+1554=1638
42x=1638-1554
42x=84
x=84:42
x=2
Vậy x=2
thực hiện phép tính : (GIÚP MÌNH NHÉ )
a, 3 . 52 - 16 : 4
b, ( 39 . 42 ) -37 . 42 ) :42
c,2448 : [119 - (23 -6 ) ]
a)156-4=152
b)42(39-37)]:42
=42.2:42
=2
c)2448:(119-17)
=2448:102
=24