Question

a, 3/2 x 4/5 - x = 2/3

b, x x 3 1/3 = 3 1/3 : 4 1/4

c,5 2/3 : x = 3 2/3 - 2 1/2

Answer 1

`@` `\text {Ans}`

`\downarrow`

`a,`

\(\dfrac{3}{2}\times\dfrac{4}{5}-x=\dfrac{2}{3}\)

\(\dfrac{6}{5}-x=\dfrac{2}{3}\)

\(x=\dfrac{6}{5}-\dfrac{2}{3}\)

\(x=\dfrac{8}{15}\)

Vậy, `x = \dfrac{8}{15}`

`b,`

\(x\times3\dfrac{1}{3}=3\dfrac{1}{3}\div4\dfrac{1}{4}\)

\(x\times3\dfrac{1}{3}=\dfrac{40}{51}\)

\(x=\dfrac{40}{51}\div3\dfrac{1}{3}\)

\(x=\dfrac{4}{17}\)

Vậy, `x=`\(\dfrac{4}{17}\)

`c,`

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

\(\dfrac{17}{3}\div x=\dfrac{7}{6}\)

\(x=\dfrac{17}{3}\div\dfrac{7}{6}\)

\(x=\dfrac{34}{7}\)

Vậy, `x=`\(\dfrac{34}{7}\)

Answer 2

a,\(\dfrac{3}{2}.\dfrac{4}{5}-x=\dfrac{2}{3}\)

\(\dfrac{4}{5}-x=\dfrac{2}{3}:\dfrac{3}{2}\)

\(\dfrac{4}{5}-x=\dfrac{4}{9}\)

\(x=\dfrac{4}{5}-\dfrac{4}{9}\)

\(x=\dfrac{16}{45}\)

 

Answer 3

b,\(x.3.\dfrac{1}{3}=\dfrac{31}{3}\div\dfrac{4}{14}\)

\(x.3.\dfrac{1}{3}=\dfrac{217}{6}\)

\(x.3=\dfrac{217}{6}\div\dfrac{1}{3}\)

\(x\div3=\dfrac{217}{2}\)

\(x=\dfrac{217}{2}\div3\)

\(x=\dfrac{217}{6}\)

Answer 4

c, \(\dfrac{52}{3}:x=\dfrac{32}{3}-\dfrac{21}{2}\)

\(\dfrac{52}{3}:x=\dfrac{1}{6}\)

\(x=\dfrac{52}{3}:\dfrac{1}{6}\)

\(x=104\)

Answer 5

bạn lm sai hết thì có đấy

Answer 6

a) 16/45

b) 217/6

c) 34/7

 

Answer 7

x = 16/45