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SP
3
VT
12 tháng 2 2023
\(a,x-\dfrac{3}{4}=\dfrac{1}{7}\\ x=\dfrac{1}{7}+\dfrac{3}{4}\\ x=\dfrac{25}{28}\\ b,x+\dfrac{7}{5}=\dfrac{9}{8}.\dfrac{4}{27}\\ x+\dfrac{7}{5}=\dfrac{1}{6}\\ x=\dfrac{1}{6}-\dfrac{7}{5}\\ x=\dfrac{-37}{30}\\ c,\dfrac{2}{5}-\dfrac{3}{7}=\dfrac{x}{70}\\ \dfrac{-1}{35}=\dfrac{x}{70}\\ \dfrac{-2}{70}=\dfrac{x}{70}\\ x=-2\\ d,\dfrac{2}{9}-\dfrac{7}{8}.x=1\\ \dfrac{7}{8}.x=\dfrac{2}{9}-1\\ \dfrac{7}{8}.x=\dfrac{-7}{9}\\ x=\dfrac{-7}{9}:\dfrac{7}{8}\\ x=\dfrac{-8}{9}\)
Y
12 tháng 2 2023
\(a,x-\dfrac{3}{4}=\dfrac{1}{7}\)
\(\Rightarrow x=\dfrac{1}{7}+\dfrac{3}{4}\)
\(\Rightarrow x=\dfrac{25}{28}\)
\(b,x+\dfrac{7}{5}=\dfrac{9}{8}.\dfrac{4}{27}\)
\(\Rightarrow x+\dfrac{7}{5}=\dfrac{1}{6}\)
\(\Rightarrow x=\dfrac{1}{6}-\dfrac{7}{5}\)
\(\Rightarrow x=-\dfrac{37}{30}\)
\(c,\dfrac{2}{5}-\dfrac{3}{7}=\dfrac{x}{70}\)
\(\Rightarrow\dfrac{-1}{35}=\dfrac{x}{70}\)
\(\Rightarrow35x=-70\)
\(\Rightarrow x=-2\)
\(d,\dfrac{2}{9}-\dfrac{7}{8}.x=1\)
\(\Rightarrow\dfrac{7}{8}x=\dfrac{2}{9}-1\)
\(\Rightarrow\dfrac{7}{8}x=-\dfrac{7}{9}\)
\(\Rightarrow x=-\dfrac{8}{9}\)
SL
6
17 tháng 8 2016
Tìm x, biết:
a. 12 + x = 122
=> x=122-12
=> x= 110
b. | x | + 4 = 8
=> /x/=8-4
=> /x/=4
=> x={4;-4}
c. 3x - 5 . 32 = 32 . 4
=> 3x=32.(4+5)
=> 3x=32.32
=> 3x=34
=> x=4
IM
17 tháng 8 2016
a)
\(12+x=122\)
=> \(x=110\)
Vậy \(x=110\)
b)
\(\left|x\right|+4=8\)
\(\Rightarrow\left|x\right|=4\)
\(\Rightarrow\left[\begin{array}{nghiempt}x=4\\x=-4\end{array}\right.\)
Vậy x=4 ; x = - 4
c)
\(3^x-5.3^2=4.3^2\)
\(\Rightarrow3^x=3^2\left(4+5\right)\)
\(\Rightarrow3^x=3^4\)
=> x=4
Vậy x=4
7 tháng 10 2018
ban khong tra loi giup minh thi thoi sao ban lai noi nhu vậy chứ
2 tháng 10 2016
Bài 1 : Đặt câu hỏi.
1. Where does Mai live?
- Mai lives in the city.
2. Where does Nam's father work?
- Nam's father works in a factory.
3. Where is he going?
- He goes to Le Loi school.
4. What do they do?
- They work in a hospital.
5. What does she do?
- She works in a museum.
6. How many brother and sister you have?
- I have two brother and one sister.
7. How many bookstores are there near my house?
- There are three bookstores near my house.
8. Where do you eat?
- We eat in a big restaurant.
9. Where is the cat?
- The cat is in the box.
10. What do you do in the afternoon?
- I play soccer in the afternoon.
Bài 2 : Điền chữ cái còn thiếu.
1. village 5. hospital
2. mountain 6. drugstore
3. beautiful 7. museum
4. place 8. flower
2 tháng 10 2016
bài 1 :
1 . where does Mai live ?
2. where does Nam's father work ?
3. where does he go to ?
4. where do they work ?
5.where does she work ?
6. how many sister and brother you have ?
7.how many bookstore near my house ?
8 . where do you eat ?
9. whre is the cat ?
10.when do you play soccer ?
Bài 2 :
1 . village
2.mountain .
3.beautiful .
4.plate
5. hospital
7 . museum
NN
25 tháng 10 2018
1, there are two armchairs in the living room
2. nam gets up at 5 in the morning
3. lan's school is on the fifth floor
4. there are 4. pupils in phong's class
5. is her school big or small
25 tháng 10 2018
mình viết câu 1 2 3 4 5 mà nó ra có câu 4 5
viết thêm câu 1 2 3
1. the woman is old
2.this is a big park
3.the house is big
thiếu đề nha bn
bằng b.nhiêu :)?