Đáp án+Giải thích các bước giải:
`a.``3/4x``-``5/6``=``-1/2`
`⇔``3/4x``=``-1/2``+``5/6``=``-3/6``+``5/6``=``3/6``=``1/2`
`⇔``x``=``1/2``:``3/4``=``1/2`.`4/3``=``2/3`
`b.``3``2/7x``-``0,125``=``4``1/4``-``150%`
`⇔``23/7x``-``5/4``=``17/4``-``3/2`
`⇔``23/7x``-``5/4``=``17/4``-``6/4``=``11/4`
`⇔``23/7x``=``11/4``+``5/4``=``16/4``=``1/4``=``4`
`⇔``x``=``4``:``23/7``=``28/23`
