в) -у - 1/8 + 6/4 + 3/4*у =
= 3/2 - 1/8 + 3/4*у - 4/4*у =
= 12/8 - 1/8 + 3/4*у - 4/4*у =
= 11/8 - 1/4*у
г) 1*3/9*5 - 1/9*х - х + 1/15 =
= 3/45 + 1/15 - 1/9*х - 9/9*х =
= 1/15 + 1/15 - 10/9*х =
= 2/15 - 10/9*х
