[tex] \frac{2}{3}y + \frac{3}{2}y - \frac{5}{2}y = \frac{2y}{3} + \frac{3y}{2} - \frac{5y}{2} = \frac{4y}{6} + \frac{9y}{6} - \frac{15y}{6} = \frac{4y + 9y - 15y}{6} = - \frac{2y}{6} = - \frac{y}{3} [/tex]
sper ca intelegi si ca te am ajutat, mi a luat mult sa reusesc sa scriu asta :)
