Question

1/2.x +3/5.(x-2)=3

 

Answer 1

`1/2.x +3/5.(x-2)=3`
`<=>1/2x+3/5x-6/5=3`
`<=>11/10x=21/5`
`<=>x=21/5:11/10=42/11`

Answer 2

1/2.x+3/5.x-3/5.2=3

x.(1/2+3/5)-6/5=3

x.11/10-6/5=3

x.11/10=3-6/5

x.11/10=9/5

x=9/5:11/10

x=18/11

Answer 3

Ta có: \(\dfrac{1}{2}x+\dfrac{3}{5}\left(x-2\right)=3\)

\(\Leftrightarrow\dfrac{1}{2}x+\dfrac{3}{5}x-\dfrac{6}{5}=3\)

\(\Leftrightarrow\dfrac{11}{10}x=\dfrac{21}{5}\)

hay \(x=\dfrac{42}{11}\)

Vậy: \(x=\dfrac{42}{11}\)

Answer 4

\(\dfrac{1}{2}.x+\dfrac{3}{5}.\left(x-2\right)=3\) 

\(\dfrac{1}{2}.x+\dfrac{3}{5}.x-\dfrac{6}{5}=3\) 

\(x.\left(\dfrac{1}{2}+\dfrac{3}{5}\right)=3+\dfrac{6}{5}\) 

\(x.\dfrac{11}{10}=\dfrac{21}{5}\) 

     \(x=\dfrac{21}{5}:\dfrac{11}{10}\) 

     \(x=\dfrac{42}{11}\)

Answer 5

42/11