Răspuns :
a-b = 34 => a=34+b
3a+2b = 187
3(34+b)+2b = 187
102 +3b+2b=187
5b=187-102
5b=85
b=85:5
b=17
a-n=34
a-17=34
a=34+17
a=51
3a+2b = 187
3(34+b)+2b = 187
102 +3b+2b=187
5b=187-102
5b=85
b=85:5
b=17
a-n=34
a-17=34
a=34+17
a=51