Question

1/20 - {x -8/5} =1/10

 

16/5 - x = 4/5 - 3/10

Answer 1

`@` `\text {Ans}`

`\downarrow`

`16/5 - x = 4/5 - 3/10`

`=> 16/5 - x = 1/2`

`=> x = 16/5 - 1/2`

`=> x = 27/10`

Vậy, `x = 27/10.`

Answer 2

giúp với

Answer 3

\(\dfrac{1}{20}-\left(x-\dfrac{8}{5}\right)=\dfrac{1}{10}\)

\(\Rightarrow\dfrac{1}{20}-x+\dfrac{8}{5}=\dfrac{1}{10}\)

\(\Rightarrow\dfrac{33}{20}-x=\dfrac{1}{10}\)

\(\Rightarrow x=\dfrac{33}{20}-\dfrac{1}{10}\)

\(\Rightarrow x=\dfrac{31}{20}\)

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\(\dfrac{16}{5}-x=\dfrac{4}{5}-\dfrac{3}{10}\)

\(\Rightarrow\dfrac{16}{5}-x=\dfrac{1}{2}\)

\(\Rightarrow x=\dfrac{16}{5}-\dfrac{1}{2}\)

\(\Rightarrow x=\dfrac{27}{10}\)

Answer 4

a) \(\dfrac{1}{20}-\left(x-\dfrac{8}{5}\right)=\dfrac{1}{10}\)

\(x-\dfrac{8}{5}=\dfrac{1}{20}-\dfrac{1}{10}=-\dfrac{1}{20}\)

\(x=-\dfrac{1}{20}+\dfrac{8}{5}=-\dfrac{1}{20}+\dfrac{32}{20}=\dfrac{31}{20}\)

b) \(\dfrac{16}{5}-x=\dfrac{4}{5}-\dfrac{3}{10}\)

\(x=\dfrac{16}{5}-\dfrac{4}{5}+\dfrac{3}{10}=\dfrac{12}{5}+\dfrac{3}{10}=\dfrac{24}{10}+\dfrac{3}{10}=\dfrac{27}{10}\)

Answer 5

\(\text{∘ Ans}\)

\(\downarrow\)

Mình bổ sung thêm

\(\dfrac{1}{20}-\left\{x-\dfrac{8}{5}\right\}=\dfrac{1}{10}\)

\(\Rightarrow x-\dfrac{8}{5}=\dfrac{1}{20}-\dfrac{1}{10}\)

\(\Rightarrow x-\dfrac{8}{5}=-\dfrac{1}{20}\)

\(\Rightarrow x=-\dfrac{1}{20}+\dfrac{8}{5}\)

\(\Rightarrow x=\dfrac{31}{20}\)

Vậy, \(x=\dfrac{31}{20}\)\(.\)