-6+4 5/8=-1 3/8
-2/9 +5/6=-8/36+30/36=22/36=11/18
2 21/26+(-3 4/13)=73/26-43/13=73/26-86/26=-13/26=-1/2
568*у=428272
у=428272:568
у=754
х+1047=8591
х=8591-1047
х=7544
наверное так
1) 36/25: (-0,3)=36/25: (-3/10)=36/25*(-10/3)=12/5*(-2)=-24/5=-4 4/5
2) 3/14:(-3,7+40/7)=3/14:(-24/10+40/7)=3/14:(-259
3) (0,6-4,7):(2целых 1/7-3целых 4/9)=