Đáp án + Giải thích các bước giải:
`7/9:(2+3/4 x)+5/9=23/27`
`=>7/9:(2+3/4 x)=23/27-5/9`
`=>7/9:(2+3/4 x)=23/27-15/27`
`=>7/9:(2+3/4 x)=8/27`
`=>2+3/4 x=7/9:8/27`
`=>2+3/4 x=7/9 . 27/8`
`=>2+3/4 x=7/1 . 3/8`
`=>2+3/4 x=21/8`
`=>3/4 x=21/8 - 2`
`=>3/4 x=21/8 - 16/8`
`=>3/4 x=5/8`
`=>x=5/8:3/4 `
`=>x=5/8. 4/3 `
`=>x=5/2. 1/3 `
`=>x=5/6`
Vậy `x=5/6`