| - 2750 | - ( 2085 + 2750 ) - [ - 438 - ( 85 - | - 438 | )] 

= 2750 - 4835 - [ - 438 - ( -353 ) ] 

= - 2085 - ( - 85 )

= - 2000 

thankiu ban

Trả lời:

|-2750| - (2085 +2750) - [ - 438 - ( 85 - |-438 | )]

= 2750 - 2085 - 2750 - (-438 - 85 + 438)

= (2750 - 2750) - 2085 - (-85)

= 0 - 2085 + 85

= -2000

Hok tốt!

Vuong Dong Yet

X = 34000 . 

X = 34 . 

x : 105 = 323 ( dư 85 )

x = 323 . 105 + 85

x = 34 000

Vậy x = 34 000

15 126 : x = 438 ( dư 234 )

x = ( 15 126 - 234 ) : 438

x = 14 892 : 438

x = 34

Vậy x = 34

x + 32 x 327 = 17985 

=> x  + 10464 = 17985 

=> x =  17985 - 10464

=> x =7521

x + 32 x 327 = 17985

x + 32 = 17985 : 327

x + 32 = 55

x = 55 - 32

x = 23

x  :105 = 323 ( dư 85 )

x = ( 323 - 85 ) x 105 

x = 24990

15126 : x = 438 ( dư 234 )

x = ( 15126 - 234 ) : 438

x = 14892 : 438 

x = 34

x + 32 x 327 = 17985

    x + 10464 = 17985

                 x = 17985 - 10464

                  x = 7521

x : 105 = 328 (dư 85)

        x = 328 x 105 + 85

        x = 34440 + 85

        x = 34525

15126 : x = 438 (dư 234)

            x = 15126 : 438 + 234

            x = .......

x-85=65

x     =65+85

x      =150

x-85=65

x=65+85=150

x=65+85=150 thế cũng phải hỏi

\(\dfrac{x}{5}=\dfrac{26}{65}\)

\(\dfrac{x}{5}=\dfrac{2}{5}\)

\(x=2\)

______________________________________________

\(\dfrac{3}{x}=\dfrac{51}{85}\)

\(\dfrac{3}{x}=\dfrac{3}{5}\)

`x=5`

\(+,\dfrac{x}{5}=\dfrac{26}{65}\\ =>x=\dfrac{5\times26}{65}=2\\+, \dfrac{3}{x}=\dfrac{51}{85}\\ =>x=\dfrac{3\times85}{51}=5\)

\(x+85=65+25\)

\(x+85=90\)

           \(x=90-85\)

           \(x=5\)

x + 85 = 65 + 25

x + 85 = 90

       x  = 90 - 85

       x  = 5

tk đi rồi tk lại
 

x + 85 = 65 + 25

x + 85 = 90

        x = 90 - 85

        x = 5

trao

đổi

k

nhe

!!!

^_^

giúp mik với huhu

=-65*85+65*17-85*17+85*65

=17*(-20)

=-340

\(\dfrac{x}{5}=\dfrac{26}{65}\)

\(\Leftrightarrow65x=130\)

\(\Leftrightarrow x=2\)

\(\dfrac{3}{x}=\dfrac{51}{85}\)

\(\Leftrightarrow51x=255\)

\(\Leftrightarrow x=5\)

`x/5=26/65`

`65xx x=5xx26`

`65xx x=130`

`x=130:65=2`

`3/x=51/85`

`51xx x=3xx85`

`51xx x=255`

`x=255:51=5`

\(\dfrac{26x5}{65}=2\)

⇒ x = 2

\(\dfrac{85x3}{51}=5\)

⇒ x=5