2 câu trả lời
`-2/5 x + 1/4 = 1 + 1/3`
`-2/5 x + 1/4 = 4/3`
`-2/5 x = 4/3 - 1/4`
`-2/5 x = 13/12`
`x = 13/12 : ( -2/5 )`
`x = -65/24`
Vậy `x = -65/24`
`-2/5x + 1/4 = 1 + 1/3`
`-2/5x + 1/4 = 3/3 + 1/3`
`-2/5x + 1/4 = 4/3`
`-2/5x = 4/3 - 1/4`
`-2/5x = 16/12 - 3/12`
`-2/5x = 13/12`
`x = 13/12 : (-2/5)`
`x = 13/12 xx (-5/2)`
`x = -65/24`
Vậy `x = -65/24`
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