Fie x numarul de mere initial. Daca dan ia jumatate din numarul lor inseamna ca el a luat 1/2 x. Deci in cos au ramas x-1/2x =1/2x
Sora ia 1/3 din cele ramase adica 1/3 * (x/2) = x/6
Deci in cos au ramas (1/2) *x - x/6 = (3-1)/6 *x = 2/6 * x=1/3 (x)
1/3 * x = 6
x = 18 mere
Raspuns : initial erau 18 mere