Question

avand cate 5000 lei, Maria si Elena au plecat la cumparaturi.Aflati cati lei a cheltuit fiecare, daca resturile sunt numere consecutive, care valoreaza la un loc cat suma cheltuita de Elena.

Answer 1

x=a cheltuit Elena, i-a ramax 5000-xy=a cheltuit Maria, i-a ramas 5000-y5000-x=5000-y+15000-x+5000-y+1 = x--------------------------------y-x=1-y-2x = -10000, si le adun------------------------------3x = -9999 I *(-1)x=3333y=x+1= 3334------------------------Verificare: 5000-3333=1667 si 5000-3334=1666, deci numere consecutive si 1667+1666 = 3333, cat a cheltuit Elena, OK.