Đáp án:
Giải thích các bước giải:
1) x- 1/3= 1/2
x=1/2+1/3
x= 5/6
Vậy x= 5/6
2) x- 3/4= 1/2
x= 1/2+3/4
x=5/4
Vậy x= 5/4
3) 2/7-x= 1/5
x= 2/7-1/5
x= 3/35
Vậy x= 3/35
4) x- 1/4= -3/8.2/5
x- 1/4= -3/20
x=-3/20+1/4
x= 1/10
Vậy x= 1/10
5) 7/6-1/6.(x-2)= 7/12-1/1/3
7/6-1/6.(x-2)= 7/12-4/3
7/6-1/6.(x-2)=4/3
1/6.(x-2)= 7/6-4/3
1/6.(x-2)= -1/6
x-2= -1/6:1/6
x-2= -1/6.6/1
x-2= -1
x= (-1)+2
x=1
Vậy x=1
6) 1/2x+1/8x=3/4
x.(1/2+1/8)= 3/4
x.5/8= 3/4
x= 3/4: 5/8
x= 3/4.5/8
x= 15/32
Vậy x= 15/32
