Răspunsuri

2014-04-01T19:54:58+03:00
9+15+11+12=47  67-47=20   20:4=5 nr care se scade
9+5=14 nr1
15+5=20 nr2
11+5=16 nr3
12+5=17 nr4
V 14+20+16+17=67

2014-04-01T19:56:07+03:00
A+b+c+d=67
9+15+11+12=47
67-47=20
20/4=5 este nr care se scade din numerele initiale
a=9+5=14,b=15+5=20,c=11+5=16 ,d=12+5=17
14+20+16+17=67