Question

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

b) 4/5 + 5/7: x = 1/6

c) 2x/3 - x/4 = 5/6.  cảm ơn :D

Answer 1

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

`(1/3-1/4)x=1`

`1/12x=1`

`x=1:1/12=12`

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`b)4/5+5/7:x=1/6`

`5/7:x=1/6-4/5`

`5/7:x=-19/30`

`x=5/7:(-19/30)`

`x=-150/133`

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`c)[2x]/3-x/4=5/6`

`x(2/3-1/4)=5/6`

`x. 5/12=5/6`

`x=5/6:5/12=2`

Answer 2

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

1/12x = 1

x = 1 . 12

x = 12

b) 4/5 + 5/7: x = 1/6

5/7 : x = 1/6 - 4/5

5/7 : x = -19/30

x = 5/7 : -19/30

x = -150/133

c) 2x/3 - x/4 = 5/6

4 . 2x - 3x = 10

8x - 3x = 10

5x = 10

x = 10 : 5

x = 2.