A=|x-1|=2

⇔x-1=2

⇔x=1

Bài 4:

a) \(\dfrac{x}{2}=\dfrac{y}{6}=\dfrac{z}{3}và\) x-y+z=18

b) \(\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{4}\) và x+2y-3z=-20

1.When did you have this motorbike?

2.I have visited HCM cite 3 times before.

3.While Jim was travelling in Paris, he met his old classmate there.

4.I have never flown in a plane before yesterday.

5.I have visited my grandparents for 2 weeks.

6.I had wored my grandparents for 3 years before I got a job with a Prench company.

1.that→those

2.on→of

3.something→anything

4.depart→departing

5.extensive→extend

6.a small→small

7.most→more

8.the largest→large

9. with→to