$\frac{x-25}{1979}$- $\frac{x-24}{1980}$+ $\frac{x-23}{1981}$+ $\frac{x-22}{1982}$=$\frac{x-1980}{25}$+ $\frac{x-1980}{24}$+ $\frac{x-1981}{23}$+ $\frac{x-1982}{22}$ tìm x nha

:vt calli:kem hoặc vẽ cây kem ưu tiên calli hơn

Dãy gồm các phi kim thể rắn ở điều kiện thường là: A. S, P, C, Si. B. C, S, Br2, Cl2. C. S, H2, N2, O2. D. P, Cl2, C, Si.

x>=1/2 hoặc x<=1/2 thì có thuộc R không giải thích

kể lại câu chuyện ở hình dưới đây theo lời kể của người leo cây trốn

tìm x a, (x+3)^2+(x-2)^2=2x^2 b, 7x(x-2)=x-2 c,8x^3-12x^2+6x-1=0 giúp mik vs

mọi người giải chi tiết giúp mình nhaaaa:3333

Làm giúp mình hết bài 2 ạ, dễ thui ạ

Có nhiều người đào câu hỏi để vote 1 sao vs báo cáo nhưng có nhiều bạn dễ thưn tìm câu hỏi cũ để vote 5 sao vs cảm ưn Vẽ mầm cute hoặc calli Thanh you hay calli cảm ơn đi 1 trong 3 nha Xấu =Bc

Rewrite the sentences 1. I advised him to think carefully before making up his mind → "You 2. "Do you know many people here?", she asked me → She 3. Helen suggested spending their weekend at the beach → "Why 4. He said, "What shall I do to help her next week?" → He wondered 5. "If I were you, I wouldn't go", said Sauna → Sauna 6. It's ages since I last saw a Hollywood film → I have 7. He prefers typing to writing by hand He'd rather 8. "No, I didn't steal anything from her", said Tom (deny) → 9. "I'll certainly help you tomorrow", said Martin to Mary > 10. "Shall I help you clear the table?", Ann said to the hostess (offer) > 11. He did not realize how difficult the task was until he was halfway through it. → Not until.... 12. My father learned to drive when he was sixteen . → My father has 13. I have never stayed in such an expensive hotel before. → This is 14. I didn't know Peter wanted to get up early so I didn't wake him up → If. 15. Somebody repaired her car yesterday → She had 16. The police fined the man driving at speed 50 dollars → The man 17. He'll die if nobody brings him to hospital → Nobody 19. "I must speak to your father about this", she said to me (INSIST) → She 20. Lan is a better cook than Mary → Mary