120-x=45-15

120-x=30

x=120-30

x=90

1. We wish we didn't have to live very far from our parents.

2. It is pointless to repair that old keyboard.

3. They didn't allow us to look at the house.

4. I would rather go by myself. (or 'I would prefer to go by myself'.)

5. I left the problem for him to solve.

6. At not time was I ever shown how to operate that machine.

7. I am having a difficulty understanding a word of this.

Tổng của đáy lớn và đáy bé là :

                   245 x 2 : 9,8 = 50 (cm)

Độ dài đáy bé là : 

                   50 : ( 1 + 3 ) =12,5 (cm) 

Độ dài đáy lớn là :

                   50 - 12,5 = 37,5 (cm) 

                                  Đ/S: Đáy bé: 12,5 cm

                                          Đáy lớn: 37,5 cm

cmr là : Chứng minh rằng .

Ta lấy: S x 2 : đường cao.

Linh used to follow her grandmother to the market when she was small.

1. brown

2. break

3. bread

4. broken

5. bring

6. pretty

7. prize

=)))