Question

90:x-48:x=3

Answer 1

`=> (90 - 48) : x =3`

`=> 42 : x = 3`

`=> x = 14`.

Answer 2

90 : x - 48 : x = 3

( 90 - 48 ) : x = 3

42 : x = 3

x = 42 : 3

x= 14

Answer 3

\(\dfrac{90}{x}-\dfrac{48}{x}=3\)

\(\dfrac{42}{x}=3\)

=> x = 42 : 3 = 14

Answer 4

(90 - 48) : x = 3

42 : x = 3

x = 42 : 3

x= 14

Vậy x = 14

Answer 5

\(90:x-48:x=3 \)

\((90-48):x=3\)

\(42:x=3\)

\(x=42:3\)

\(x=14\)

Answer 6

90 : x - 48 : x = 3

( 90 - 48 ) : x = 3

42 : x = 3

x = 42 : 3

x= 14

Answer 7

90 : x - 48 : x = 3

(90 - 48) : x = 3

42 : x = 3

x = 42 : 3 = 14

Answer 8

90:x-48:x=3

[90-48]:x=3

x=42:3

x=14

Answer 9

90:x-48:x=3

(90-48):x=3

42:x=3

     x=42:3

     x=14

Answer 10

`90 : x - 48 : x = 3`

`=> (90 - 48) : x = 3`

`=> 42 : x = 3`

`=>        x  = 42 : 3`

`=>        x  = 14`

___________________________

áp dụng :

`a xx b + b xx c`

`=> b xx ( a +c)`

 

Answer 11

 90 : x - 48 : x = 3

    (90 - 48) : x = 3

              42 : x = 3    

                     x = 42 : 3 

                     x = 14