[tex] \frac{15}{12 } + \frac{7}{12} + \frac{2}{5} = [/tex]
[tex]amplificam \: primele \: doua \: fractii \: cu \: 5.iar \: pe \: a \: treia \: cu \: 12[/tex]
[tex] \frac{15 \times 5 + 7 \times 5 + 2 \times 12}{60} = \frac{75 + 35 + 24}{60} = \frac{134}{60} = \frac{67}{30} [/tex]
