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

\(x\times\dfrac{3}{5}=\dfrac{3}{3}\)

\(x\times\dfrac{3}{5}=1\)

\(x=1:\dfrac{3}{5}\)

\(x=1\times\dfrac{5}{3}\)

\(x=\dfrac{5}{3}\)

\(x-\dfrac{4}{9}=\dfrac{3}{7}:\dfrac{9}{14}\)

\(x-\dfrac{4}{9}=\dfrac{3}{7}\times\dfrac{14}{9}\)

\(x-\dfrac{4}{9}=\dfrac{2}{3}\)

\(x=\dfrac{2}{3}+\dfrac{4}{9}\)

`x`\(=\dfrac{18}{27}+\dfrac{12}{27}\)

\(x=\dfrac{30}{27}=\dfrac{10}{9}\)

Câu 1: Tác phẩm Quốc âm thi tập là của ai ? (1đ)

a. Nguyễn Trãi.

b. Lê Thánh Tông.

c. Lý Tử Tấn.

d .Lương Thế Vinh.

a: \(=\dfrac{48-45}{54}\cdot\dfrac{9}{4}=\dfrac{3}{54}\cdot\dfrac{9}{4}=\dfrac{27}{216}=\dfrac{1}{8}\)

b: \(=\dfrac{6}{5}+1=\dfrac{11}{5}\)

c: \(=\dfrac{7\cdot28\cdot15}{9\cdot25\cdot14}=\dfrac{1}{2}\cdot\dfrac{28}{25}\cdot\dfrac{5}{3}=\dfrac{140}{150}=\dfrac{14}{15}\)

thank

= 1046,4 + 1030,4 + 1123,2

= 2076.8 + 1123,2

= 3200

ai giúp mình , mình cho coin

\(\dfrac{x}{7}=\dfrac{18}{14}\)

<=> 14 . x = 18 . 7

<=> 14x = 126

<=> x = \(\dfrac{126}{14}=9\)

Ta có:\(\dfrac{x}{3}=\dfrac{y}{4}=\dfrac{z}{6}=\dfrac{x}{3}=\dfrac{2y}{2.4}=\dfrac{3z}{3.6}\)

Áp dung tcdtsbn , ta có: 

\(\dfrac{x}{3}=\dfrac{2y}{2.4}=\dfrac{3z}{3.6}=\dfrac{x+2y-3z}{3+8-18}=\dfrac{-14}{-7}=2\)

\(\Rightarrow\left\{{}\begin{matrix}x=6\\y=8\\z=12\end{matrix}\right.\)

áp dụng t/c dtsbn ta có:

\(\dfrac{x}{3}=\dfrac{y}{4}=\dfrac{z}{6}=\dfrac{x+2y-3z}{3+2.4-3.6}=\dfrac{-14}{-7}=2\)

\(\dfrac{x}{3}=2\Rightarrow x=6\\ \dfrac{y}{4}=2\Rightarrow y=8\\ \dfrac{z}{6}=2\Rightarrow z=12\)

0,32 : x = 5 - 3,4

=> 0,32 : x = 1,6

=>           x = 0,32 : 1,6

=>           x = 0,2

0,32 : x = 5 - 3,4 

=> 8/25 : x = 8/5

=>  x = 8/25 : 8/5 

=> x = 8/25 . 5/8

=> x = 1/5

Vậy ...

1,8-3,7+x=0,32

-1,9+x=0,32

x=0,32-(-1,9)

x=0,32+1,9

x=2,22

2,22

k nha !