Question

giúp mình vs ạ

Answer 1

Câu 6:

1: x=-1/6+1/9=-3/18+2/18=-1/18

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

=>x=-1/3+4/7=-7/21+12/21=5/21

3: =>2x-1/3=3

=>2x=10/3

=>x=5/3