Răspunsuri

2014-10-19T19:19:49+03:00
72-52=20(al treilea numar)
20+15=35(al doilea numar)
72-35=37(primu numar)

2014-10-19T19:27:35+03:00
A+b+c=72
a+b=52
c=72-52=20
b=c+15
b=20+15
b=35
a+b=52
a+35=52
a=52-35
a=17
V:20+35+17=72 ( A )
   35+17=52 ( A )
   35-20=15 ( A )