Можно так:
1) ,03<x<12,23, x=12,13
2) 12,03<x<12,33, x=12,13, x=12,23
3) 12,03<x<12,43, x=12,13, x=12,23, x=12,33
4) 12,03<x<12,53, x=12,13, x=12,23, x=12,33, x=12,43
5) 12,03<x<12,63, x=12,13, x=12,23, x=12,33, x=12,43, x=12,53
6) 12,03<x<12,73, x=12,13, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63
7) 12,03<x<12,83, x=12,13, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73
8) 12,03<x<12, x=12,13, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73, x=12,83
9) 12,13<x<12,33, x=12,23
10) 12,13<x<12,43, x=12,23, x=12,33
11) 12,13<x<12,53, x=12,23, x=12,33, x=12,43
12) 12,13<x<12,63, x=12,23, x=12,33, x=12,43, x=12,53
13) 12,13<x<12,73, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63
14) 12,13<x<12,83, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73
15) 12,13<x<12,93, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73, x=12,83
16) 12,23<x<12,43, x=12,33
17) 12,23<x<12,53, x=12,33, x=12,43
18) 12,23<x<12,63, x=12,33, x=12,43, x=12,53
19) 12,23<x<12,73, x=12,33, x=12,43, x=12,53, x=12,63
20) 12,23<x<12,83, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73
21) 12,23<x<12,93, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73, x=12,83
22) 12,33<x<12,53, x=12,43
23) 12,33<x<12,63, x=12,43, x=12,53
24) 12,33<x<12,73, x=12,43, x=12,53, x=12,63
25) 12,33<x<12,83, x=12,43, x=12,53, x=12,63, x=12,73
26) 12,33<x<12,93, x=12,43, x=12,53, x=12,63, x=12,73, x=12,83
27) 12,43<x<12,63, x=12,53
28) 12,43<x<12,73, x=12,53, x=12,63
29) 12,43<x<12,83, x=12,53, x=12,63, x=12,73
30) 12,43<x<12,93, x=12,53, x=12,63, x=12,73, x=12,83
31) 12,53<x<12,73, x=12,63, x=12,73, x=12,83
32) 12,53<x<12,83, x=12,63, x=12,73
33) 12,53<x<12,93, x=12,63, x=12,73, x=12,83
34) 12,63<x<12,83, x=12,73
35) 12,63<x<12,93, x=12,73, x=12,83
36) 12,73<x<12,93, x=12,83
Пошаговое объяснение:
Можно купить 4 ручки