`10,` `2/3` `x` `-` `1` `2/5` `=1/2x` `+1`
`→` `2/3x-7/5=1/2x+1`
`→` `2/3x-1/2x` `=` `1+7/5`
`→` `(2/3-1/2)x` `=` `12/5`
`→` `1/6x=12/5`
`→` `x=12/5:1/6`
`→` `x=72/5`
Vậy `x=72/5`
`11,` `4x-(2x+1)=3-1/3+x`
`→` `4x-2x-1=8/3+x`
`→` `2x-1=8/3+x`
`→` `2x-x=8/3+1`
`→` `x=11/3`
Vậy `x=11/3`
`14,` `3(x-1/2)-5(x+3/5)=-x+1/5`
`→` `3x-3/2-5x-3=-x+1/5`
`→` `-2x-9/2=-x+1/5`
`→` `-2x+x=1/5+9/2`
`→` `-x=47/10`
`→` `x=-47/10`
Vậy `x=-47/10`
