Giúp mk vs a ̣ nhanh vote 5 sao

Đáp án:

Giải thích các bước giải:

`c, 1/4 + 3/4 : x = 2/3`

`=> 4/4 : x = 2/3`

`=> 1 : x = 2/3`

`=> x = 1 : 1/3`

`=> x = 1 xx 3`

`=> x =3`

Vậy `x=3`

`d, 1/2 - (2/3 x + 1 ) = (-3)/5`

`=> 2/3 x + 1 = 1/2 - (-3)/5`

`=> 2/3 x + 1 = 1/2 + 3/5`

`=> 2/3 x + 1 = 5/10 + 6/10`

`=> 2/3 x + 1= 11/10`

`=> 2/3 x = 11/10 - 1`

`=> 2/3 x = 11/10 - 10/10`

`=> 2/3x = 1/10`

`=> x = 1/10 : 2/3`

`=> x = 1/10 xx 3/2`

`=> x = 3/20`

Vậy `x = 3/20`

`e, x - 4/6 = 5/25 + (-7)/15`

`=> x - 4/6 = 15/75 - 35/75`

`=> x - 4/6 = -4/15`

`=> x = -4/15 +  4/6`

`=> x = -8/30 + 20/30`

`=> x = 12/30`

`=> x = 2/5`

Vậy `x = 2/5`

`g, x - 5/6 = 16/42 - 8/56`

`=> x - 5/6 = 5/21`

`=> x = 5/21 + 5/6`

`=> x = 10/42 + 35/42`

`=> x = 45/42`

`=> x = 15/14`

Vậy `x=15/14`