Răspuns :
m=nr castane Maria;a=andrei;c=ciprian;
m/4=a/2=c=k
m=4k
a=2k
c=1k
4k+2k+k=91
7k=91
k=13
m=4*13=52
a=2*13=26
c=13
m/4=a/2=c=k
m=4k
a=2k
c=1k
4k+2k+k=91
7k=91
k=13
m=4*13=52
a=2*13=26
c=13
m+a+c=91;
a=m/2=>m=2a;
c=a/2=> a=2c se inlocuieste in a 2-a=> m=2*2c=4c.
Se inlouiesc rezultatele in prima=> 4c+2c+c=91=> 7c=91=> Ciprian c=13;
Maria m=4c=4*13=52;
Andrei a=2c=2*13=26