Răspunsuri

2014-05-13T14:07:40+03:00
Notam cu x varsta cautata
45+x=15+x+11+x+7+x
45+x=33+3x
45-33=3x-x
12=2x
x=12:2
x=6 ani

Verificare:
45+6=15+6+11+6+7+6
51=21+17+13
51=51 ADEVARAT