plsss cinevaa am nevoie raaapid :((( DAU COROANA

Echiunitara:
2a+3b=12
a=3; b=2
2×3+3×2=12
6+6=12
12=12;
fractia este: 12/12
Subunitara:
2a+3b<12
a=3; b=1
2×3+3×1<12
6+3<12
9<12;
fractia este:9/12
a=2;b=2
2×2+3×2<12
4+6<12
10<12;
fractia este:10/12