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Va rog ajutatimaa.....repede

Va Rog Ajutatimaarepede class=

Răspuns :

[tex]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} [/tex]
[tex]\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} [/tex]