Question

các bạn giúp mình vs dc ko ạ , mình càn gấp lắm luôn ạ 

Answer 1

Bài 3: 

1: =>2x=-5/3-1/2=-10/6-3/6=-13/6

hay x=-13/12

2: =>3/5x=1/7+3/5=5/35+21/35=26/35

hay x=26/3

3: =>-3x=5/6+3/4=10/12+9/12=19/12

hay x=-19/36

4: =>1/2x=3/7-5/4=12/28-35/28=-23/28

hay x=-23/14

5: =>1/4x=-3/5-7/5=-2

hay x=-8

6: =>3x=1/42+1/7=1/42+6/42=1/7

hay x=1/21