(31/20-26/45)×(-36/35)
(31/20-26/45)×(-36/35)
By Maya
By Maya
Đáp án:x={0}
cho mik 5* cảm ơn và ctlhn
`(31/20-26/45)×(-36/35)<x<(51/56+8/21+1/3)×8/13`
`⇔ ((31×9-26×4)/180)×(-36/35)<x<((51×3+8×8+56)/(7×8×3))×8/13`
`⇔ 175/180 × -36/35 <x< ((21×13×8)/(7×8×3×13))`
`⇔ ((5×35×(-36))/(5×36×35)) < x < ((3×7×13×8)/(3×7×13×8))`
`⇔ -1 < 1`