X-3=1/2x-6+x-5 có là Pt bậc hay ko

x+(x+1)+(x+2)+(x+3) +...+13 +14=14

1. Did you often go to the beach when you lived in Nha Trang? => Did you use .........................................................................................? 2. Linda doesn't live with her parents any more. =>Linda used ........................................................................................ . 3. I don't have time to collect stamps when I was in primary school. => I used ................................................................................................ . 4. He is not a poor man any more, but he becomes a rich businessman. => He used ............................................................................................ . 5. They didn't often go to the cinema every Sunday last year. => They didn't use ......................................................................................... . 6. My hair now is much longer than that in the past. => In the past my hair used ............................................................................ . 7. I usually atayed up late to watch football matches last year, but now I don't. => I used ............................................................................................................ . 8. There were aome trees in the field, but now there aren't any. => There used .................................................................................................... . 9. I went swimming every Thursday when I was at school. => I used __________________________________ 10.Did your father use to drive to work? => Did your father __________________________________ giúp mik với ạ

.16.They will show flying cars to the public when they finish it.  Flying cars …………………………………………………………………….. 17.They will install solar panels on the roof of our house next week.  Solar panels ……………………………………………………………… 18.We will be using biogas for cooking and heating at this time next month.  Biogas ………………………………………………………………………………... 19.People won’t burn fossil fuels for energy in the future.  Fossil fuels ………………………………………………………………… 20.New York has more billionaires than Tokyo. (FEWER)  ………………………………………………………………………………………. 21.Let’s go to the school cafeteria. (ABOUT)  ………………………………………………………………………………………. 22. I thought the ending of the film is quite shocking. “AT”) I was shocked……………………………………………………………………………. 23. Despite her young age, she performs excellently. Although………………………………………………………………………………….. 24.. Be careful or you’ll fall off your bicycle. If you are not . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25.. My mother washed clothes by hand last year, but now she no longer does it. My mother used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.. The film is very interesting. I am interested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27.They sell these chemicals everywhere in my hometown. These chemicals.................................................................................................... 28..My children will turn off the lights when going to bed. The lights ..........................................................................................................

x+(x+1)+(x+2)+(x+3) +...+13 +14=14

Cho tam giác ABC cân tại A có góc A< 90 độ. Kẻ BH vuông góc với AC,CK vuông góc với AB. Gọi O là giao điểm của BH và CK. Chứng minh a,Tam giác ABH=tam giác ACK b,OK=OH c,Trên nửa mặt phẳng bờ BC không chứa điểm A lấy điểm I sao cho IB=IC.Chứng minh ba điểm A,O,I thẳng hàng

Cho khí CO qua 15,36g hh lấy dư gồm Fe2O3, FeO, CuO,Fe nung nóng sau khi phản ứng xảy ra hoàn toàn thu được 12,96g chất rắn A và V lít khí. V?

Y nghĩa câu thơ: đô kì đóng cõi Mê Linh, Lĩnh Nam riêng 1 triều đình nước ta

1. 3x - 7 X + 1 --------- + ------- = - 16 2 3 2. X - x + 1 2x + 1 --------- = --------- 3 5 3. 2x - 1 5x + 2 --------- - ---------- = x + 13 3 7 4. 3(x + 3) 1 5x + 9. 7x - 9 ----------- + - = --------- - --------- 4 2 3 4

hòa tan hoàn toàn 20g hỗn hợp Y gồm Zn và Cu vào dung dịch HCl 0,5 M thu đc 4,48 l H2 đktc . tính % khối lượng tổng chất Y và thể tích ax