28 supra 70 +36 supra 90 +1 supra 3
dau 50 de puncte

[tex] \frac{28}{70} + \frac{36}{90} + \frac{1}{3} \\ = \frac{14}{35} + \frac{18}{45} + \frac{1}{3} \\ = \frac{14}{35} + \frac{2}{5} + \frac{1}{3} \\ = \frac{14}{35} + \frac{14}{35} + \frac{1}{3} \\ = \frac{28}{35} + \frac{1}{3} \\ = \frac{84}{105} + \frac{35}{105} \\ = \frac{119}{105} = \frac{17}{15} [/tex]

Asta e rezultatul, sper ca te ajuta ❤️