1440 мин......................
15,75x+27,5-9,9x-x=(15,75x-9,9x-x)+27,5=4,85x+27,5
1)x<span>⩾-6
2)-x</span><span>⩽4
х</span>⩾-4
3) y>16 на 5
4) y>2
5)x⩽-3
6 x⩽4
95837-(95137+198)=95837-95137-198= 502
24/25 и 15/25
11/36 и 21/36
30/40 и 19/40
35/42 и 31/42
18/40 и 13/40
68/100 и 1/100
69/96 и 1/96
138/140 и 139/140