1-2x=9/8+7/5:2/5. SOS

Đáp án+Giải thích các bước giải:

`1-2x=\frac{9}{8}+\frac{7}{5}:\frac{2}{5}`

`=>1-2x=\frac{9}{8}+\frac{7}{5}*\frac{5}{2}`

`=>1-2x=\frac{9}{8}+\frac{7}{2}`

`=>1-2x=\frac{9}{8}+\frac{28}{8}`

`=>1-2x=\frac{37}{8}`

`=>2x=1-\frac{37}{8}`

`=>2x=\frac{8}{8}-\frac{37}{8}`

`=>2x=-\frac{29}{8}`

`=>x=-\frac{29}{8}:2`

`=>x=-\frac{29}{8}*\frac{1}{2}`

`=>x=-\frac{29}{16}`

Vậy `x=-\frac{29}{16}`