1) a+b=2695
b=3a/8 deci 8b=3a
inmultim prima ecuatie cu 3
3a+3b=2695*3
8b+3b=2695*3
11b=245*11*3
b=245*3=735
a=2695-735=1960
a-b=1960-735=1225
2)
8/8a+3/8a=2695
(8a+3a);8=2695
11a=2695*8=245*11*8
a=245*8=1960
b=245*8*3/8=245*3=735
a-b=1960-735=1225=5*245
