12). ilie + paul = 30
ilie. |....|.....|.....|.....|
Paul |....| } 30
30 : 5 = 6 goluri ( Paul )
6 × 4 = 24 goluri ( Ilie )
15). a - b = 154
a : b = 5 rest 14 = > a = 5b + 14
5b + 14 - b = 154
4b = 154 - 14
4b = 140
b = 140 : 4
b = 35
a = 35 + 154
a = 189
