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a; |\(x\)| = 3,45

    \(\left[{}\begin{matrix}x=-3,45\\x=3,45\end{matrix}\right.\)

   Vậy \(x\) \(\in\) {- 3,45; 3,45}

b;   \(\dfrac{36}{x}\) = \(\dfrac{18}{5}\)

     18\(x\) = 36.5

     18\(x\) = 180

         \(x=180:18\)

         \(x\) = 10

Vậy \(x=10\)

      \(\dfrac{2x-3}{3}\) = \(\dfrac{3y-2}{5}\) = \(\dfrac{2x-3y-1}{2x}\)

Áp dụng tính chất dãy tỉ số bằng nhau ta có:

\(\dfrac{2x-3}{3}\) = \(\dfrac{3y-2}{5}\) = \(\dfrac{2x-3y-1}{2x}\) = \(\dfrac{2x-3-3y+2-2x+3y+1}{3-5-2x}\) 

       \(\dfrac{2x-3}{3}\) = \(\dfrac{\left(2x-2x\right)+\left(-3y+3y\right)+\left(-3+2+1\right)}{\left(3-5\right)+2x}\)

       \(\dfrac{2x-3}{3}\) = \(\dfrac{3y-2}{5}\) = \(\dfrac{0+0+0}{-2-2x}\) = 0

         2\(x-3=0\) ⇒ \(x=\dfrac{3}{2}\); 3y - 2 = 0 ⇒ 3y = 2 ⇒ y = \(\dfrac{2}{3}\)

Vậy \(x=\dfrac{3}{2}\); y = \(\dfrac{2}{3}\) 

1 laugh => laughed

2 goes => went

3 need => needs

4 was bumped => bumped

5 being => are

6 is => had been

7 since => for

Em xem bài viết theo link dưới đây em nhé. 

https://olm.vn/cau-hoi/dua-ra-quan-diem-cua-ban-than-ve-van-de-hoc-sinh-thcs-bao-luc-hoc-duong-giup-minh-voi-minh-dang-can-gap-a-cam-on-moi-nguoi-a.9279640593785

150km

1/ How long have you been here?

-> _______When did you go here?_____________________

2/ This is the first time I have seen such a beautiful girl.

-> __I have never seen such a beautiful girl__________________________________

3/ I haven’t gone to school for 4 months because of covid-19.

-> _____I last went to school 4 months ago because of covid-19.______________________________

-> ______The last time I went to school was 4 months ago because of covid-19.___________________________

-> ____It is 4 months since I last go to school because of covid-19________________________________

4/ I have never visited Halong Bay before.

-> ______This is the first time I have ever visited HLB____________________________

5/ I haven’t cheated in exam for years.

-> _____It's years since I last cheated in exam__________________________________

-> ___I last cheated in exam years ago____________________________________

-> _____The last time I cheated in exam was years ago___________________________________

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