Răspuns :
2a+3b=201
3a+2b=144
2a+2b+b=201
2a+2b+a=144
rezulta ca b-a=201-144=57
b=a+57
2a+2*(a+57)+a=144
2a+2a+114+a=144
5a=144-114
5a=30
a=30:5=6
b=6+57=63
Proba: 2x6+3x63=12+189=201
3a+2b=144
2a+2b+b=201
2a+2b+a=144
rezulta ca b-a=201-144=57
b=a+57
2a+2*(a+57)+a=144
2a+2a+114+a=144
5a=144-114
5a=30
a=30:5=6
b=6+57=63
Proba: 2x6+3x63=12+189=201
2a+3b=201
3a+2b=144
----------------l
5a+5b=345
5(a+b)=345
a+b=345÷5
a+b=69
a=69-b
2×(69-b)+3b=201
138-2b+3b=201
b=201-138
b=63
a=69-63
a=6
verificare
2×6+3×63=201
12+189=201
201=201
3×6+2×63=144
18+126=144
144=144
3a+2b=144
----------------l
5a+5b=345
5(a+b)=345
a+b=345÷5
a+b=69
a=69-b
2×(69-b)+3b=201
138-2b+3b=201
b=201-138
b=63
a=69-63
a=6
verificare
2×6+3×63=201
12+189=201
201=201
3×6+2×63=144
18+126=144
144=144