Question

Va rog ajutatimaa.....repede

Answer 1

$a* \frac{2}{3} * \frac{14}{13} = \frac{11}{15} \\ a* \frac{2*14}{3*13}= \frac{11}{15} \\ a* \frac{28}{39} = \frac{11}{15} \\ a= \frac{11}{15}:\frac{28}{39} \\ a= \frac{11}{15} * \frac{39}{28} \\ a= \frac{11*39}{15*28} \\ a= \frac{429}{420} \\ a= \frac{429:3}{420:3} \\ a= \frac{143}{140}$

Answer 2

$\displaystyle z \cdot \frac{2}{3} \cdot \frac{14}{13} = \frac{11}{15} \\ \\ z \cdot \frac{28}{39} = \frac{11}{15} \\ \\ z= \frac{11}{15} : \frac{28}{39} \\ \\ z= \frac{11}{15} \cdot \frac{39}{28} \\ \\ z= \frac{429}{420} ^{(3} \\ \\ z= \frac{143}{140}$