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Bài làm:

Đề ra = x +1/2 .x - 0,25 .x =10

=> x .( 1 +1/2 -0,25) =10

=> 1,25 .x =10

=> x = 10 :1,25

=> x =8

#Chúc bạn học tốt :))

6 tháng 3 2020

x+1/2x-25%x=10

<=>x(1+1/2-1/4)=10

<=>x.5/4=10

<=>x=8

Vậy x=8

6 tháng 3 2020

(x+1)+(x+2)+(x+3)+...+(x+30)=795

<=> (x+x+x+...+x)+(1+2+3+...+30)=795

<=> 30x+[(30+1) x 30:2]=795

<=> 30x+465=795

<=> 30x=330

<=> x=11

6 tháng 3 2020

Ta có : ( x + 1 ) + ( x + 2 ) + ... + ( x + 30 )           = 795

      <=> ( x + x + x +... + x ) + ( 1 + 2 + ... + 30 ) = 795

     <=>  30.x + 465                                               = 795

    <=> 30 .x                                                        = 795- 465 

   <=> 30 . x                                                        =   330

   <=> x                                                              = 330 : 30

  <=> x                                                             = 11

Vậy x = 11

6 tháng 3 2020

số đâu

6 tháng 3 2020

Gửi câu hỏi Linh tinh

6 tháng 3 2020

So so hang cua tong do la :(98-10):2+1=45 (so hang)

Tong cac so chan co hai chu so la :(98+10).45:2=2430

D/S:2430.

6 tháng 3 2020

Số chẵn đầu tiên có 2 chữ số là 10

Số chẵn cuối cùng có 2 chữ số là 98

Số số hạng số chẵn có 2 chữ số là:

(98-10):2 +1=45(số số hạng)

=> Tổng số chẵn có 2 chữ số là:

\(\frac{\left(98+10\right)45}{2}=2430\)

6 tháng 3 2020

Tìm x                                         

       2.(x - 3) - 3 = 4.(3 + x) - 18

          2x - 6 - 3 = 12 + 4x - 18

- 6 - 3 - 12 + 18 = 4x - 2x

                      -3=2x

                         \(\frac{-3}{2}\)=x

Vậy x=\(-\frac{3}{2}\)

125 - 39 x + 3 = 65

39 x + 3 = 125 - 65

39 x + 3 = 60

39 x = 60 - 3

39 x = 57

     x = \(\frac{19}{13}\)

Vậy x=\(\frac{19}{13}\)

6 tháng 3 2020

(-4).2.6.25.(-7).25

=-100.50.-14

=-5000.-14

=70000

6 tháng 3 2020

1. I don't want to eat anything because I am not hungry

2. How much beef do you want ?

3. Thuy and her friends are skipping rope now

4. Phong goes fishing three times a week

5. There is a garden behind the/our/my school

6 tháng 3 2020

1,I DONT WANT EAT ANYTHING BECAUSE I,M NOT HUNGRRY

2,HOW MUCH BEEF DO YOU WANT

3,Thuy and her friends are skipping rope now

4,Phong goes fishing three times a week

5, There is a garden behind my/our my school

quá dễ vậy mà cũng kg biết làm

EXERCISE 1: Use the words in brackets to complete the sentences. Use much/ a bit … etc.+ a comparative.Her illness was …………………. We thought at first (much/serious)This bag is too small. I need something ………………. (much/big)I’m afraid the problem is ……………….. it seems.(much/complicated)You looked depressed this morning but you look ……….. now(a bit/happy)I thought she was younger than me but in fact she’s ……….(slightly/old)EXERCISE 2: Complete...
Đọc tiếp

EXERCISE 1: Use the words in brackets to complete the sentences. Use much/ a bit … etc.+ a comparative.

Her illness was …………………. We thought at first (much/serious)

This bag is too small. I need something ………………. (much/big)

I’m afraid the problem is ……………….. it seems.(much/complicated)

You looked depressed this morning but you look ……….. now(a bit/happy)

I thought she was younger than me but in fact she’s ……….(slightly/old)

EXERCISE 2: Complete the sentences using an/no + a comparative

I’m fed up with waiting. I’m not waiting…………….. (long)

This shop isn’t expensive. The prices are ……………. Anywhere else(cheap)

The traffic isn’t particularly bad today. It’s ……………… usual (bad)

EXERCISE 3: Complete the sentences using “Double” Comparatives

It’s becoming ……………….. to find a job (hard)

The hole in your pullover is getting ………….. (big)

My bags seemed to get ……………. As I carried them (heavy)

As I waited for my interview, I became  …………….. (nervous)

As the day went on the weather got …………. (bad)

Travelling is becoming …………….. (expensive)

As the conversation went on, he became …………… (talkative)

Since she has been in England, her English has got …..(good)

 

EXERCISE 4: Finish these sentences using a comparative structure

1.     I like warm weather. The warmer the weather, ………….. (good/ feel)

2.     It’s hard to concentrate when you are tired. The more tired you are ………. (hard/concentrate)

3.     She had to wait a very long time. The longer she waited,………….. (impatient/become)

EXERCISE 5: Match the two halves containing the structure “the ……the……”

 

 

   the earlier we leave

   the longer he waited

   the more I got to know him

   the more you practise your English

   the longer the phone call

   the more goods you sell

  the faster you’ll learn

  the more you have to pay

  the sooner we’ll arrive

  the more profit you’ll make

  the more impatient he became

  the more I liked him

1
6 tháng 3 2020

EX1: 1. Much more serious

         2. Much bigger

         3. Much more complicated 

         4. A bit happier

         5. Slightly older

EX2: 1. Longer

         2. No cheaper

         3. No worse

EX3: 1. Harder and harder

         2. Bigger and bigger

         3. Heavier and heavier

         4. More and more nervous

         5. Worse and worse

         6. more and more expensive

          7. More and more talkative

         8. Better and better

EX4: 1. The better feeling

         2. The harder concentration 

         3. The more impatient becoming

EX5: 1.The earlier we live, the sooner we'll arrive

2. The longer he waited, the more impatient he became

3. The more I got to know him, the more I him

4. The more you practise your E, the faster you learn

5. The longer the phone call, the more you have to pay

6. The more goods you sell, the more profit you make

"Xin lỗi nhưng bài 2 với bài 4 tớ không rõ lắm"

6 tháng 3 2020

Chép mạng đi bn

6 tháng 4 2020

ngủ

 ăn

chơi dt, maystinh ,tv

6 tháng 3 2020

Sau 3 tháng người đó thu được số tiền ,ãi là:

(5000000x0,8%)x3=120000(đồng)

Vậy...