tìm x biết:

\(\left(\dfrac{3}{5}-x\right).\left(\dfrac{2}{5}-x\right)>0\)

ex1: Rewrite

1-The last time she visited me was 5 weeks ago

->She hasn't visit

2-Huong began to collect stamps in 2016

->Huong has

3-Keeping the enviroment clean is very important

->It's

4-Mai wrote a note on the board

->A note

5-They will recycle the warte paper in a local factory

->The wast paper

6-The children are decorating the house

->The house

7-How do people cook this kind of food ?

->How

8-Have you tidied the living room?

->Has

9-People didn't organized this festiwal some years ago

->This festiwal

10-You should open the wine

->The wine