Đáp án + Giải thích các bước giải:
Ta có :
`a,14-3x=-x+4`
`->-3x+x=-14+4`
`->-2x=-10`
`->x=5`
Vậy `x=5`
`-------`
`b,2(x-2)+7=x-25`
`->2x-4+7=x-25`
`->2x-x=4-7-25`
`->x=-28`
Vậy `x=-28`
`a, 14-3x=-x+4`
`⇔-3x+x=4-14`
`⇔-2x=-10`
`⇔x=5`
b, `2(x-2)+7=x-25`
`⇔2x-4+7=x-25`
`⇔2x-x=-25-3`
`⇔x=-28`
Rewrite these sentences , using IF : 1. He didn't prepera for the interview , sohe didn't get the job . =>...................................................................................................... 2. We came home from our holiday early because we ran out of money . =>....................................................................................................................... 3. I can't take much exercise because I don't have enough free time . =>............................................................................................................ 4. The house didn't burn down because the fire brigade came immediately . =>............................................................................................................................. 5. The men were wearing protective clothing , so they were all quite safe . =>...................................................................................................................... 6. People don't realize how important it is to conserve energy . so they do nothing about it . =>........................................................................................................................................................ 7. I took the job because I didn't know how difficult it was . =>............................................................................................... 8. My father didn't earn much money , so life wasn't easy for us . =>............................................................................................................ 9. Daniel really wanted to buythe book , but he didn't have enough money . =>............................................................................................................................ 10. There isn't any truth in her allegations , so I won't resign . =>.............................................................................................. 11. Andrew wanted to ask Frank Sinatra for his autograph , but he wasn't brave enough. =>..................................................................................................................................................... 12. I don't know anything about plumbing , so I can't fix the leak to the sink myself. =>....................................................................................................................................... 13. Rita is exhausted today because she didn't get any sleep last night . =>................................................................................................................... 14.The doctor doesn't really care about his patient . He didn't explain the medical procedure to me before surgery. =>...................................................................................................................................................... 15. Bob left his wallet at home this morning , and now he doesn't have any money for lunch. =>.........................................................................................................................................................
Có ai không giúp mình làm bài này với pls 😢😭😭
Viết đoạn văn khoảng 10 câu theo cách diễn dịch Phân tích khổ thơ Ông đồ vẫn ngồi đấy qua đường không ai hay lá vàng rơi trên giấy ngoài giời mưa bụi bay trong đoạn văn có sử dụng câu nghi vấn gạch chân phân tích và chỉ rõ câu nghi vấn
x+1 x+2 x+4 _____+ ______+ _______+7= 0 15 7 4
114. Nha Trang is a …………………… city lies near the sea of Vietnam. (coast)115. Good ………………………… were the keys to ……………………. (prepare / succeed)116. The teacher stressed the need for regular ………………………. (attend)117. You shouldn’t tell anyone about this information. It’s …………………….. (confidence) 118. Tet is the time for everyone in their family to be …………………… after a hard-working year faraway from their home. (unite)119. Her flowers …………………………… won the first prize. (arrange)120. We call the person who works in a library a ………………………. (library)121. Don’t believe anything she says, she tends to ……………………… things. (dram) 26. ………………………., the police caught the thief a little while later. (fortune)127. Kimonos are the ………………………. Clothes in Japan. (tradition)128. There are many ……………………… around the year in Vietnam. (festive)129. That man was so …………………………. that he lost the ob. (organization)130. Her …………………….. to Philip didn’t last very long. (marry)132. Linda made a more rapid ……………………… from illness than expected. (recover)133. During his speech, he kept on ……………………… his tie. (straight)134. Travel is said to …………………. the mind. (broad)135. Marie Curie’s husband sudden death didn’t make her life……………………… (mean) 136. Vietnam is ……………………… for its cultural heritage sites. (know)137. Nobody can measure the …………………… of this lake. (deep)138. He made some minor ……………………… before printing the report. (revise) 141. ………………… is based on shared interest. (friend)143. Shakespeare is probably one of the world’s most famous ………………………… (play)144. At the circus, we saw a ……………………. doing some marvelous things. (magic)) 147. When I went downstairs, I ……………………… come across my old friend. (accident)148. We’ve taken only twenty new ……………………… this year already. (employ) 151. We have to……………………. a lot of phrasal verbs. (memory)152. It was the biggest ………………………. since the war. (demonstrate)153. Stamp-collecting holds a strange……………………… for some people. (fascinate)154. Do you feel …………………………. when you are away from home ? (sick) 157. What is the correct ……………………………. of this word ? (pronounce)158. What would you do if you were a …………………………. ? (million) giúp mk nốt nha!
Câu 5: Một người bán dầu chỉ có một cái ca 0,5 lít và một cái ca 1 lít. Người đó chỉ bán được dầu cho khách hàng nào sau đây? A. Khách hàng cần mua 1,4 lít B. Khách hàng cần mua 3,5 lít C. Khách hàng cần mua 2,7 lít D. Khách hàng cần mua 3,2 lít
+ Vật nhiễm điện còn gọi là gì? + Chiếc lược nhựa sau khi cọ xát vào mảnh vải khô, thanh thuỷ tinh sau khi cọ xát vào mảnh lụa, mảnh nilon, mảnh phim sau khi được cọ xát vào len, có khả năng gì? + 2 vật sau khi cọ xát vào nhau rồi tách chúng ra, có hiện tượng gì xảy ra? Thanks,giúp mình nh
Giúp mk vs ,bài tập vận dụng bài 1 nha
Dạ mọi người tóm tắt giúp tớ bài 3 với ạ.
· For questions 1-15, read the text below and write the word which best fits in each space. Use only one word in each space. ║ Pre-History That fragment of pottery, that little piece of bone, or the remains of an early human tool are (1) ..... often the only evidence we have of our early history. However, (2) ..... a consequence of the work of archaeologists and others in this field, we have (3) ..... the years built (4) ..... an extremely good understanding of early human development. This is the case (5) ... the fact that there is no written evidence of the period we term Pre-History. (6) ..... is startling to note is that this period, which predates the invention of writing, accounts (7) ..... 99% of human existence. It was (8) ..... this time that discoveries that shaped the human race were made, early settlements created that (9) ..... to become our major cities and (10) ..... general was the time when the very foundations of human civilization were laid. The evidence of our pre-history can be found everywhere, from remnants of human existence buried deep in the ground (11) ..... ancient pathways and burial grounds. The first and easiest place to start your exploration of prehistory is of (12) ..... your local museum, particularly (13) ... you are interested in discovering more about the area where you live. You may (14) ..... have a local archaeological group that would be prepared to let you work (15) ..... a volunteer.
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