1) 8 5 2*8-5*3 1
2-- - 1-- = 1---------- = 1---
9 6 18 18
2) 7 1 3*7-4*1 17
16-- - 9-- = 7---------- = 7---
8 6 24 24
3) 16 11 4*16-5*11 9
19---- - 12--- = 7------------- = 7----- = 7,09
25 20 100 100
4) 3 1 3*3-2*1 7
22---- - 10--- = 12---------- = 12---
10 15 30 30