Đáp án:
`↓↓↓`
Giải thích các bước giải:
`a)` `x+1/6=-3/8`
`x` `=-3/8-1/6`
`x` `=-13/24`
`b)` `1/2x + 1/8x = 3/4`
`x. ( 1/2+1/8)=3/4`
`x. 5/8` `=3/4`
`x` `=3/4:5/8`
`x` `=6/5`
`c)` `2-|3/4-x|=7/12`
`|3/4-x|=2-7/12`
`|3/4-x|=17/12`
`3/4-x=17/12` hoặc `3/4-x=-17/12`
`x=3/4-17/12` `x=3/4-(-17/12)`
`x=-2/3` `x=13/6`
Vậy `x∈{-2/3;13/6}`
`d)` `(2x-4,5):3/4-1/3=1`
`(2x-4,5):3/4` `=1+1/3`
`(2x-4,5):3/4` `=4/3`
`2x-4,5` `=4/3 . 3/4`
`2x-4,5` `=1`
`2x` `=1+4,5`
`2x` `=5,5`
`x` `=5,5:2`
`x` `=11/4`
