x + 1/4 = -3/4 . 23/-15 . (-45/92) (x -3/4) - 1/4 = 3/5 . (-1/3)

`x + 1/4 = ( - 3 )/4 . 23/( - 15 ) . (- 45 )/92`

`⇒ x + 1/4 = 23/20 . ( - 45 )/92`

`⇒ x + 1/4 = ( - 9 )/16`

`⇒ x = ( - 9 )/16 - 1/4`

`⇒ x = ( - 13 )/16`

Vậy `, x = ( -13 )/16 .`

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`( x - 3/4 ) - 1/4 = 3/5 . ( - 1 )/3`

`⇒ x - 3/4 - 1/4 = ( - 1)/5`

`⇒ x - 1 = ( - 1 )/5`

`⇒ x = ( - 1 )/5 + 1`

`⇒ x = 4/5`

Vậy `, x = 4/5 .`