$(x-2,6)+(x-0,6)+(x-4,6)+(x-7,4)+(x-5,4)+(x-10,6) = 44$
$=>x -2,6 +x -0,6 +x -4,6 +x -7,4 +x -5,4 + x -10,6 =44$
$=> 6x -10=44$
$=> 6x = 44+10$
$=> 6x =54$
$=>x =9$
`( x - 2,6 ) + ( x - 0,6 ) + ( x - 4,6 ) + ( x - 7,4 ) + ( x - 5,4 ) + ( x - 10,6 ) = 44`
`⇔ ( x + x + x + x + x + x ) + ( 2,6 + 0,6 + 4,6 + 7,4 + 5,4 - 10,6 ) = 44`
`⇔ 6x + [ ( 7,4 + 0,6 ) + ( 2,6 + 5,4 ) + ( 4,6 - 10,6 ) ] = 44`
`⇔ 6x + [ 8 + 8 + ( - 6 ) ] = 44`
`⇔ 6x + [ 16 + ( - 6 ) ] = 44`
`⇔ 6x + 10 = 44`
`⇔ 6x = 44 + 10`
`⇔ 6x = 54`
`⇔ x = 54 : 6`
`⇔ x = 9`
Vậy `, x = 9 .`
Giải giúp mik nhũng câu này vs ạ Mik xin cảm ơn
giúp với, nhanh chút, mình đg cần gấp
Tìm tất cả số nguyên x sao cho : (x^3-8x^2+2x) chia hết cho x^2+1. Giúp em với ạ đang cần gấp nhưng khó nên em không biết giải sao:((((.
11: ____________ the experiment several times, the scientists finally succeeded in developing a new vaccine. A. Having carried out B. Have been carried out C. Have carried out D. Have been carrying out GẤP LẮM RÙI CẢ NHÀ ƠI, CÍU EM VỚI
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In 60 – 80 words, write a paragraph about the benefits of reading books .
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xy - x -y = 2 help meeeeeeeeeeeeeeeee
* Choose the best answer A, B, C or D to complete the sentences: 1. A person who acts in a comedy is a __________ . A. reporter B. comedian C. film producer D. MC 2. ________ TV channels are there in Viet Nam? A. What B. When C. How many D. How often 3. __________ the Haunted Theatre is frightening, children love it. A. Because B. So C. But D. Although 4. Hoa likes _________ weather because she can go swimming. A. hot B. cold C. rainy D. wet 5. He __________ late for school. A. never is B. is never C. go never D. are never 6. _________ eat too much salt. It’s not good for you. A. Don’t B. Do C. Please D. Can’t 7. There aren’t ___________ good films on television at the moment. A. some B. a lot C. any D. a 8. There will be more floods if we _________ down more forests. A. cuts B. cut C. will cut D. cutting 9. I have studied English __________ four years. A. in B. at C. since D. for 10. That is the _________ book I’ve ever read. A. most bored B. borest C. boring D. most boring * Supply the correct tense or form of the verbs in parentheses: 11. My father (visit)____________ Sa Pa next week. A. has visited B. visited C. will visit D. visits 12. They (meet)____________ their friends two weeks ago. A. met B. have met C. meet D. will meet 13. I (go) ____________ to Singapore three times. A. visited B. have visited C. has visited D. will visit 14. ___________ (not throw) rubbish on the street. A. shouldn’t throw B. don’t throw C. doesn’t throw D. mustn’t throw 15. Mary might not (come) __________ to the party tonight because she is busy. A. come B. comes C. to come D. coming
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