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2 năm trước
giải phương trình sau: a; [(2x-1)/5]-[(x-2)/3]=[(x+7)/15] b; [(x+3)/2]-[(x-1)/3]=[(x+5)/6]+1 (giải giúp e với ạ, e đang cần gấp ạ)
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Các câu hỏi liên quan

I. Choose the word that has the underlined part pronounced differently from the rest. 1. A. historic B. exciting C. island D. firework 2. A. calendar B. celebrate C. decorate D. school 3. A. wonder B. compass C. brother D. forest 4. A. beach B. teach C. feather D. peaceful 5. a. clothes B. fireworks C. scissors D. mountains 6. A. programme B. any C. channel D. father 7. A. brother B. weather C. theater D. father 8. A. this B. throw C. theme D. think II. Choose the best option (A,B,C or D) to complete the following sentences. 1. People often clean and decorate their houses ________ Tet. A. during B. after C. before D. on 2. Turn left at the first traffic lights, and you’ll see the supermarket straight ________. A. away B .ahead C. aside D. again 3. Mekong River is ________ river in South East Asia. A. long B. longer C .longest D. the longest 4. You ________ speak during the exam - it’s forbidden A. should B .shouldn’t C. must D. mustn’t 5. Some of her paintings are displayed at the local ________. A. art gallery B. museum C. stadium D. hospital 6. The Vietnamese ________ Tet at different times each year. A. decorate B. watch C. celebrate D. welcome 7. ________ we go out for dinner tonight? - Great! A. Must B. Can C. Will D. Shall 8. ________ does Tet last? ~ About 10 days A. When B. How long C. What time D. How often 9. Life in the countryside is ________. There aren’t many things to do there. A. interesting B. inconvenient C. boring D. noisy 10. Lan: ‘Can you tell me the way to Tan Ky House, please?’ Mai: ‘________. Go straight, then turn right.’ A. Certainly B .Let’s go C .Good idea D. My pleasure

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