(5/6x + 7/8x)*42 = 82
(20/24x + 21/24x)*42 = 82
41/24х * 42 = 82
41/24х = 82/42
х = 82/42 : 41/24
х = 82/42 * 24/41
х = 8/7 = 1 1/7
1. 1/6 = 3/18, 1/9 = 2/18
1/30 = 5/150, 1/50 = 3/150
1/24 = 5/120, 1/120
3/40 = 15/200, 7/25 = 56/200
2. 30/48 = 5/8 = 35/56 < 36/56
56/84 = 8/12 = 72/108 < 82/108
121/77 = 11/7 = 33/21 < 45/21
49/63 = 7/9 = 35/45; 34/85 = 2/5 = 18/45; 35/45 > 18/45; 49/63 > 34/85
0,36x-0.15y-0.6x+1.5y=-0.24x+1.35y
1) 6 3/3
2) 3 8/8
3) 8 8/8
4) 10 12/12
5) 9 99/99
6) 8 5/5
7) 7 4/4
8) 4 9/9