Question

Tìm x:
a) 2 + 1/3 - x = 1 + 1/4
b) (2/7 x 2) : x = 1 :7/2 

Ai giải giúp đi, mình cần gấp

Answer 1

a) 2 + 1/3 - x = 1 + 1/4

7/3 -x = 5/4

x = 7/3 - 5/4

x = 13/12

b) (2/7 x 2) : x = 1 :7/2 

4/7 : x = 2/7

x = 4/7 : 2/7

x = 2

Answer 2

a) 2 + 1/3 - x = 1 + 1/4

           7/3 -x = 5/4

                  x = 7/3 - 5/4

                  x = 13/12

b) (2/7 x 2) : x = 1 :7/2 

          4/7 : x = 2/7

                  x = 4/7 : 2/7

                  x = 2

Answer 3

a) 2 + 1/3 - x = 1 + 1/4

2 + 1/3 - x =  5/4

7/3 - x =  5/4 

x = 7/3 - 5/4

x = 13/12
b) (2/7 x 2) : x = 1 :7/2  

(2/7 x 2) : x = 2/7

4/7 : x = 2/7

x = 4/7 : 2/7

x = 2

Answer 4

`a) 2 + 1 / 3 - x = 1 + 1 / 4`

`6 / 3 + 1 / 3 - x = 4 / 4 + 1 / 4`

`7 / 3 - x = 5 / 4`

`x = 7 / 3 - 5 / 4`

`x = 28 / 12 - 15 / 12`

`x = 13 / 12`

______________________________

`b) ( 2 / 7 xx 2 ) : x = 1 : 7 / 2`

` 4 / 7 : x = 2 / 7`

`x = 4 / 7 : 2 / 7`

`x = 4 / 7 xx 7 / 2`

`x = 2`

Answer 5

a 13/12

b 2