Gọi số công nhân ban đầu là `x (` công nhân `, x ∈ N** )`
Ta có `: 20x = ( 20 + 10 ) . ( x - 20 )`
`⇔ 20x = 30 . ( x - 20 )`
`⇔ 20x = 30x - 600`
`⇔ 30x - 20x = 600`
`⇔ 10x = 600`
`⇔ x = 600 : 10`
`⇔ x = 60`
Vậy `,` ban đầu có `60` công nhân `.`
1 would you mind(watch) my bag for a few minu tes 2 do you fancy (go) out this evening? 3 he wants (buy) a new computer game 4 i'd like (speak) to mr davis, please.Is he there 5 please avoid (make) silly mistakes in this exercise 6 the children would love (eat) french fries 7 she really loves (work) with children 8 we tried (call) you but your mobile was off 9 they intend (build) houses on the school playing fields 10 i can't stand (do) the washing up help me !
1. My brother is a good__________ of ship. (design) 2. This film isn’t__________ to the public now. (access) 3. __________, the new printer I bought yesterday isn’t working. (Luck) 4. Finally, he__________ to become an astronaut in 1998. (decision) 1. Regular exercise is just as__________ as eating the right type of food. (importance) 2. Good__________ were the key to success. (prepare) 3. One advantage of living in the countryside is that the air is__________. (pollute) 4. The new equipment he bought last year works__________. (effect) 1. The Internet has helped students study more__________. (effective) 2. You are invited to view one of our autumn__________. (collect) 3. They are discussing the causes of air__________. (pollute) 4. Covid-19 has had__________ consequences for the economy. (disaster) 1. She has been learning__________ for five years. (France) 2. She didn’t__________ surprised at the news. (appearance) 3. A__________ is the person whose job is writing books, stories, articles, etc. (write) 4. Covid 19 is a dangerous pandemic which has caused a lot of__________. (die)
Mọi người giúo em vs ạ Em cảm ơn ạ Cho hàm số bậc nhất y=mx+x+m. Tìm giá trị của m để hàm số a) đồng biến b) nghịch biến
Giải thích tại sao làm vậy giúp e vs
Giúp mình với cảm ơn mn thực sự luôn á
Nhanhhhhhhhhh Tại sao hoa sen xuất hiện đầu tiên tại Ấn Độ mà lại là biểu tượng của Việt Nam
Ai giúp với ạ 30 đ đủ ko ạ hứa vote năm sao
mang bot cac so ben trong ra ben ngoai dau can √50 √162 √338 √48 √192 √20 √180 √500 √150 √486 √112 √448
giúp mink câu này mink cho 5 sao
đặt câu với: more than enough *cụm đó bằng với từ plenty of*
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