`2.|1/2x-1/3|=7/8`
`=> |1/2x-1/3| = 7/8 :2`
`=> |1/2x-1/3| = 7/16`
`=> 1/2x -1/3 = 7/16` hoặc `1/2x-1/3 = (-7)/16`
`+) 1/2x - 1/3 = 7/16`
`=> 1/2x = 7/16 + 1/3`
`=> 1/2x = 37/48`
`=> x = 37/48 : 1/2`
`=> x = 37/24`
`+) 1/2x - 1/3 = (-7)/16`
`=> 1/2x = (-7)/16 + 1/3`
`=> 1/2x = (-5)/48`
`=> x = (-5)/48 : 1/2`
`=> x = (-5)/24`
Vậy `x\in{37/24 ; (-5)/24}`
