MN

Những câu hỏi liên quan
VL
DH
22 tháng 7 2021 lúc 21:41

1 for

2 been

3 than

4 so

5 writes

6 more

7 at

8 take

9 the

10 of

11 but

12 not

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NL
29 tháng 11 2021 lúc 15:18

chữ đẹp thế

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DT
18 tháng 2 2022 lúc 21:42

3. Tin's grandma told him not to go out then because it was snowing severely.
4. My brother said to me water boiled at 100 degrees Celsius.
5. Louis said watching cartoons had been his number one hobby years before, but he were into horor movies then.
6. The librarian told Arinna the book she was looking couldn't be there.
7. Mom said her friend had invited her to a wedding ceremony so she would have to buy a new dress.
8. Jennie said she had to finish that assignment that day and send it to the teacher via e-mail the next day.
9. The girl said those dry flowers looked even more gorgeous than the ones she had received.
10. Mr. Thomas always says his children are well-behaved.

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TT
18 tháng 2 2022 lúc 21:36

ko nhìn thấy j đâu e

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NN
18 tháng 2 2022 lúc 21:39

pls help me ;-;

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ZH
H24
2 tháng 3 2022 lúc 15:15

\(a,3\left(x-1\right)-4=2\left(x+1\right)-7\\ \Leftrightarrow3x-3-4=2x+2-7\\ \Leftrightarrow3x-7=2x-5\\ \Leftrightarrow x-2=0\\ \Leftrightarrow x=2\\ b,\left(x+1\right)\left(3x-1\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}x+1=0\\3x-1=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=-1\\x=\dfrac{1}{3}\end{matrix}\right.\)

c, ĐKXĐ:\(x\ne\pm3\)

\(\dfrac{x+3}{x-3}-\dfrac{x-3}{x+3}=\dfrac{3}{x^2-9}\\ \Leftrightarrow\dfrac{\left(x+3\right)^2}{\left(x-3\right)\left(x+3\right)}-\dfrac{\left(x-3\right)^2}{\left(x-3\right)\left(x+3\right)}-\dfrac{3}{\left(x-3\right)\left(x+3\right)}=0\\ \Leftrightarrow\dfrac{\left(x^2+6x+9\right)-\left(x^2-6x+9\right)-3}{\left(x-3\right)\left(x+3\right)}=0\\ \Rightarrow x^2+6x+9-x^2+6x-9-3=0\\ \Leftrightarrow12x-3=0\\ \Leftrightarrow x=\dfrac{1}{4}\left(tm\right)\)

d, \(d,\dfrac{x-3}{4}-\dfrac{2x+3}{3}=\dfrac{5x-1}{3}+\dfrac{2x+9}{12}\\ \Leftrightarrow d,\dfrac{3\left(x-3\right)}{12}-\dfrac{4\left(2x+3\right)}{12}=\dfrac{4\left(5x-1\right)}{12}+\dfrac{2x+9}{12}\\ \Leftrightarrow3x-9-8x-12=20x-4+2x+9\\ \Leftrightarrow-5x-21=22x+5\\ \Leftrightarrow27x+26=0\\ \Leftrightarrow x=-\dfrac{26}{27}\left(tm\right)\)

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ZH
NT

a: \(2+\dfrac{3\left(x+5\right)}{8}>\dfrac{x-1}{4}\)

=>\(2+\dfrac{3}{8}x+\dfrac{15}{8}>\dfrac{1}{4}x-\dfrac{1}{4}\)

=>\(\dfrac{3}{8}x+\dfrac{31}{8}>\dfrac{1}{4}x-\dfrac{1}{4}\)

=>\(\dfrac{1}{8}x>-\dfrac{1}{4}-\dfrac{31}{8}=\dfrac{-33}{8}\)

=>x>-33

b: \(2x-x\left(2x+1\right)< =15-2x\left(x+2\right)\)

=>\(2x-2x^2-x< =15-2x^2-4x\)

=>x<=15-4x

=>5x<=15

=>x<=3

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H24
ZH
NT
15 tháng 1 2022 lúc 8:46

a: \(\Leftrightarrow2x^2-2x+3x+6-2x^2+3=0\)

=>x+9=0

hay x=-9

b: \(\Leftrightarrow10x-30-4x=10x-5\)

=>-4x=-5+30=25

=>x=-25/4

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LD
Xem chi tiết
KA
18 tháng 5 2022 lúc 21:53

j

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H24
18 tháng 5 2022 lúc 21:53

:)?

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LD
18 tháng 5 2022 lúc 21:57

Có rồi nha

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