Question

giúp mình với, mình cảm ơn

Answer 1

`a, 5/9+ x/(-1)=-1/3`

`=> x/(-1)=-1/3-5/9`

`=>x/(-1)=-3/9-5/9`

`=.x/(-1)=-8/9`

`=>9x=-1.(-8)`

`=>9x=8`

`=>x=8/9`

`b, 4/5 - 5/6<= x/30 <= 1/3-3/10`

`=> 24/30-25/30 <=x/30<= 10/30-9/30`

`=> -1/30<=x/30<= 1/30`

`=>x=-1;0;1`