urgeent dau coroana

Răspuns:
a+b+c=375
b=15+a
b=c-18 c=b+18
inlocuim:
a+15+a+15+a+18=375
3a+48=375
3a=375-48
3a=327
a=327:3
a=109(primul concurent)
b=15+109=124(al doilea concurent)
c=124+18=142(al treilea concurent)