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17 tháng 4 2022

KHÔNG ĐĂNG LUNG TUNG

17 tháng 4 2022

Cho cái zé báo cáo chừ

13 tháng 6 2015

a+bxc=7

a-bxc=5

=>a+bxc+a-bxc=7-5

=>2a=2

=>a=1

a+b+c=6 =>b+c=5

a-bxc=-5

=>bxc=1-(-5)=6

=>b=2 c=3 hoặc b=3 c=2

13 tháng 6 2015

a = 1

b = 2

c = 3

3 tháng 1 2016

=> 2(a+b+c)=113+107+100=320 

a+b+c=320:2=160

a=160-107=53 

b=160-100=60

c=160-113=47 

đáp số : a=53 ; b=60 ;c = 47

các bn cho mk vài li-ke cho tròn 660 với 

3 tháng 1 2016

a = 53

b =60

c = 47

9 tháng 4 2018

Giải:

1) a+b=c => a=c-b

b=a-c

2) a:b=c => a=c.b

b=a:c

3)a.b=c => a=c:b

b=c:a

h đúng cho mk nha!

\(\hept{\begin{cases}a+b=9\\b+c=7\\a-c=2\end{cases}}\)Mak C = 2  \(\Rightarrow\hept{\begin{cases}a+b=9\\b+2=7\\a-2=2\end{cases}}\)\(\Rightarrow\hept{\begin{cases}a=4\\b=5\\c=2\end{cases}}\)

\(\Rightarrow2ac-b=2\cdot4\cdot2-5=11\)

4 tháng 4 2020

c =2

suy ra b =7-c =7-2 =5,a =c +2 =2+2=4

vậy 2.c.a-b=2.2.4-5=11

Select and circle A, B or C:1. What are they doing? – They are _____ with paper boat.A. doingB. makingC. playing2. Has she got any pet? – No, she_____.A. hasB. hasn’tC. haven’t3. How many ______ are there in your bedroom? – There are two.A. chairB. chairsC. x4. What’s Mai doing? – She ______.A. play cyclingB. cyclingC. cycles5. How old is your_______? – He’s thirty-four.A. sisterB. motherC. father6. What is the ---------- today?A. activityB. colourC. weather7. --------- many...
Đọc tiếp

Select and circle A, B or C:

1. What are they doing? – They are _____ with paper boat.

A. doing

B. making

C. playing

2. Has she got any pet? – No, she_____.

A. has

B. hasn’t

C. haven’t

3. How many ______ are there in your bedroom? – There are two.

A. chair

B. chairs

C. x

4. What’s Mai doing? – She ______.

A. play cycling

B. cycling

C. cycles

5. How old is your_______? – He’s thirty-four.

A. sister

B. mother

C. father

6. What is the ---------- today?

A. activity

B. colour

C. weather

7. --------- many cats do you have?

A. Why

B. How

C. What

8. what _____ are your dogs? – They are black and white.

A. colour

B. yellow

C. sunny

9. ……………is that man? - He is my father

A. Who

B. What

C. He

D. His

10. My brother is twelve years ………

A. age

B. how

C. old

D. new

11. There ……..a garden in my house

A. be

B. is

C. are

D. aren’t

12. There is a pond ……….. front of my house.

A. in

B. off

C. to

D. of

13. ……there a garden in your house?

A. Are

B. Is

C. What

D. Where

14. The gate ……….the house is blue

A. of

B. for

C. to

D. in

15. ……… are my books? -They’re on the desk

A. What

B. Where

C. What

D. How

16. There are two pictures ………..the wall

A. in

B. above

C. on

D. to

17. There is a chair between the table……… the wardrobe

A. and

B. in

C. on

D. or

18. How……….. chairs are the in the classroom?

A. old

B. much

C. many

D. long

19. Are there …………posters on the wall?

A. any

B. a

C. one

D. the

20. Are there any chairs in the room? - No, There …………….

A. are

B. is

C. aren’t

D. isn’t

Đây lak bài tập của thằng em mk, mk lười quá nên các bn giúp nhá!!

4

1. What are they doing? – They are _____ with paper boat.

A. doing

B. making

C. playing

2. Has she got any pet? – No, she_____.

A. has

B. hasn’t

C. haven’t

3. How many ______ are there in your bedroom? – There are two.

A. chair

B. chairs

C. x

4. What’s Mai doing? – She ______.

A. play cycling

B. cycling

C. cycles

5. How old is your_______? – He’s thirty-four.

A. sister

B. mother

C. father

6. What is the ---------- today?

A. activity

B. colour

C. weather

7. --------- many cats do you have?

A. Why

B. How

C. What

8. what _____ are your dogs? – They are black and white.

A. colour

B. yellow

C. sunny

9. ……………is that man? - He is my father

A. Who

B. What

C. He

D. His

10. My brother is twelve years ………

A. age

B. how

C. old

D. new

11. There ……..a garden in my house

A. be

B. is

C. are

D. aren’t

12. There is a pond ……….. front of my house.

A. in

B. off

C. to

D. of

13. ……there a garden in your house?

A. Are

B. Is

C. What

D. Where

14. The gate ……….the house is blue

A. of

B. for

C. to

D. in

15. ……… are my books? -They’re on the desk

A. What

B. Where

C. What

D. How

16. There are two pictures ………..the wall

A. in

B. above

C. on

D. to

17. There is a chair between the table……… the wardrobe

A. and

B. in

C. on

D. or

18. How……….. chairs are the in the classroom?

A. old

B. much

C. many

D. long

19. Are there …………posters on the wall?

A. any

B. a

C. one

D. the

20. Are there any chairs in the room? - No, There …………….

A. are

B. is

C. aren’t

D. isn’t

8 tháng 11 2021

b=33

c=12

a=10

Vậy a+b+c= 54

3 tháng 1 2016

=> 3(a+b+c+d)=210+170+180+130=690

a+b+c+d=690:3=230 

=> a=230-170=60

b=230-180=50

c=230-130=100

d=230-210=20

đáp số : a=60;b=50;c=100;d=20

các bn cho mk vài li-ke cho tròn 670 với 

3 tháng 1 2016

bài này cấp tiểu học nha bạn !! ^^

9 tháng 7 2016

A + B = C

C - B = A

C - A = B

Đúng thì k nhé ! avt716249_60by60.jpg

9 tháng 7 2016

C - B = A

C - A = B