Hà còn số bông hoa là :

    34 - 12 = 22 ( bông hoa )

          Đáp số : 22 bông hoa .

1. The writer's English is now better than before.___T___

2. The writer has never been Australia before.___T___

3. Jenny has visited many World Heriage Sites as Viet Nam.___F___( P/s: Because she has never been to Viet Nam)

4. The pen pal mantioned is as old as the writer.___T___

5. They correspond in Vietnamese.___F___( P/s: Because they correspond in English)

6. The writer has met Jenny recently.___F___( P/s: Because the writer has never met Jenny)

A. |a|=6

vậy a = 6 hoặc -6

B. |a|=|-5|   suy ra |a|=5

vậy a = 5 hoặc -5

C.|a|=0

vậy a= 0

D. -10|a|=-20

        |a| = -20 : -10

        |a| = 2

vậy a = 2 hoặc -2

a)3x - 34 = 1

  3x        = 1 + 34

  3x        =35

  x         = 35 :3 

  x        =11.(6)

3x + 19 = 3

3x        = 3 - 19 

3x         = -16

x           = -16 :3

x           = -5,(3)

|x - 1| = 0

x       =0+1

x      =1 hoặc -1

4 |-2x -3 | = 8

   |-2x -3 | =8 :4

   |-2x -3 |= 2

   |-2x - 3 | =2  hoặc              |-2x -3 |= -2

    -2x       =2+3                     -2x     =-2+ 3

     x     =5 : -2                        -2x   = 1

     x= -2.5                              x       = 1 : -2

                                                 x =-1

abc = 6abc : 17

abc = (6000+abc) : 17

6000 + abc = abc x 17

6000 = abc x 16

abc = 6000 : 16

abc = 375

Phép chia đó là 9*9+8=89

ĐS 89

3 lít chiếm 1/4-1/6=1/12

Thùng có 3*12=36 lít

ĐS 36 lít