Question

Afla cate kilograme de fructe a cumparat o gospodina daca 2 kilograme cantaresc merele , perele cat merele si jumatate din prune , iar prunele cat merele si perele la un loc .

Answer 1

K = M + P + R
unde K=numarul total de kilogramge
        M=kilogramele de mere
        P=kilogramele de pere
        R=kilogramele de prune
M = 2 kg
P = M + 1/2 R
R = P + M = M + 1/2R + M = 2M + 1/2R => 1/2R = 2M => 1/2R = 4 kg => R = 8 kg

P = M + 1/2 R = 2kg + 4kg = 6kg

K = M + P + R = 2 kg + 6kg + 8kg = 16 kg