Question

×÷z-y÷z=5 ×-y=20 determina z

Answer 1

(x-y):z=5
20:z=5
z=20:5
z=4

Answer 2

x:z-y:z=5(daca si x si y se impart la acelasi numar, adica z, il dam factor comun pe z)
(x-y):z=5(nois tim ca x-y=20 si inlocuim)
20:z=5
z=20:5
z=4
Bafta la scoala!! ;D