Х: (3-2 1/9)+1 2/15=-2 1/18 по действиям.

Х:(3-2 1/9)+1 2/15=-2 1/18
х:(3-2 1/9)=-2 1/18 - 1 2/15
х:(2 9/9-2 1/9)=-2 15/90 - 1 12/90
х: 8/9=-3 27/90
х: 8/9=-3 3/10
х= -33/10 * 8/9
х= -11*4/5*3
х= -44/15
х= -2 14/15

1. 3-21/9=-18/9
2. х:(-18/9)=-18/9х
3. -18/9х+12/15=-21/18