1/ (a+b-c)-(b-c+d)=a+b-c-b+c-d
2/-(a-b+c)+(a-b+c)=-a+b-c+a-b=c
Học lớp 6 chưa thạo phần nầy nguy lắm bn eey cố gắng nhé !
$1) (a+b-c)-(b-c+d)$
$⇔ a+b-c-b+c-d$
$2)-(a-b+c)+(a-b+c)$
$⇔-a+b-c+a-b=c$
x/35-90-x/45=2/5 Làm hộ đúng cho 5 sao
Các bạn giúp mik nha bài 1 và 2 PART C. READING I. Read the following passage and put a word in the box in each of the numbered blanks. hobby improve when wrote because My Favourite Hobby My name is Sara. My favourite(1) ____________ is reading. I enjoy reading a book when I am free. I started to do it (2)____________ I was four years old. The first time I did it, I felt interested. So I kept reading. The teachers always taught me to read the difficult words. I was happy when I read a story with a happy ending. I enjoy reading (3)______________ I like to explore the imaginative world of my favourite author, J.K. Rowling who (4)_____________ “ Harry Potter”. There are a lot of advantages of reading. Reading can make me relaxed and calm. I can also learn new vocabulary items. Then I can further (5)________________ my English. II. Choose the correct word A, B, C or D for each gap to complete the following passage. There are many reasons (1)________ it is important to have a hobby. First of all, a hobby can be a remedy for your (2)________. Because it is the activity you choose for yourself, it will always give you pleasure and (3)________ you relax. Even if you just spend a little time enjoying your hobby, you can see the difference in your spirit. Second, some hobbies can also (5)________ you financially. Many old people enjoy gardening. They grow a lot of trees and vegetables, so they can sell them for some money. In addition, a hobby can help you connect with other people. If you like collecting stamps, you can (5)________ a stamp club to share your albums with other collectors. If your hobby is carving eggshells, you can give your products to your friends as gifts. 1 A. for B. why C. because D. so 2 A. happiness B. pain C. tiredness D. unhappy 3 A. help B. have C. do D. work 4 A. harm B. give C. benefit D. receive 5 A. take part B. join C. go D. come
PHÂN SỐ BẰNG NHAU Bài 1 : Tìm x,y ∈ Z , Biết : a,-4/8 = x/10=-7/2y b,-33/x=y/8=45/-120 c,x/15=7/y=8/z=-20/60 Bài 2 : Tìm x,y ∈ Z biết : a, x-1/55=77/121=28/y+2 b,x+7/14=12/y-3=3/2 c,x+3/6=2/2-y=1/6 mik đang cần gấp mn trả lời giúp mik nhé mik viết hơi khó hỉu chút
ai làm và vẽ hộ mk vào Word r gửi cho mk với ạ!!!
cho A(3;5); B(1;0) . Tìm tọa độ điểm C sao cho vecto OC=2 VECTO AC
Tom (1. Work) works at a bank. He (2. Be) ………. the manager. He (3. Start) ……… work every day at 8.00 a.m. He (4. Finish) ……….. work every day at 6.00 p.m. He (5.live) ……. very close to the bank. He (6.walk) ……….. to work every morning. His brother and sister also (7.work) ……… at the bank. But, they (8.not live) ………. close to the bank. They (9.drive)…………… cars to work. They (10. Start) ………….. work at 9:00 a.m. In the bank, Tom (11.be) ……………. the boss. He (12.help) ………….. all the workers and (13.tell) …………. them what to do. He (14.like) ………. his job. He (15.be) …………… also very good at his job. Many customers (16.like) …………… Tom and they (17.say) …………… hello to him when they (18.come) ……….. to the bank. Tom (19.like) …………. to talk to the customers and (20.make) ……….. them feel happy. Tom really (21.like) ………… his job.
-1/2×(2/5-x) mũ 4 = 23/32 - 75%
Tính các tổng sau: a) [(-18) + (-17)] + (-15); b) 666 - (-442) -100 – 88; c) - ( - 315) +(-115) - 105 + 25; d) 888 - (-333) - 222 + 70
Cho mình hỏi sao ra được dấu bằng thứ 2 vậy
tìm các số nguyên a để phương trình sau có nghiệm duy nhất và nghiệm đó có giá trị nguyên: (a^2-1)x=a^2-6a+5
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