A+6+M+6+G+6=62 ani
A+M+G+6*3=62
A+M+G+18=62
A+M+G=62-18
A+M+G=44 ANI ( in prezent)
A=G:3......=> G=3A
M=A:2-1...=> A=(M+1)*2....=> A=2M+2....=> G=(2M+2)*3...=> G=6M+6
2M+2+M+6M+6=44
9M+8=44
9M=44-8
9M=36
M=36:9
M=4 ani are in prezent Mario
A=(4+1)*2
A=5*2
A=10 ani are in prezent Alin
G=10*3
G=30 ani are in prezent George
verificare:
(10+6)+(4+6)+(30+6)=
=16+10+36
=26+36
=62 de ani vor avea impreuna peste 6 ani
Raspuns: George are in prezent 30 ani ....=> d)30