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Resolvemos :
![( \frac{-11}{9}) / ( \frac{-8}{13}) ( \frac{-11}{9}) / ( \frac{-8}{13})](https://tex.z-dn.net/?f=%28+%5Cfrac%7B-11%7D%7B9%7D%29+%2F+%28+%5Cfrac%7B-8%7D%7B13%7D%29+++)
![\frac{ \frac{-11}{9} }{ \frac{-8}{13} } \frac{ \frac{-11}{9} }{ \frac{-8}{13} }](https://tex.z-dn.net/?f=+%5Cfrac%7B+%5Cfrac%7B-11%7D%7B9%7D+%7D%7B+%5Cfrac%7B-8%7D%7B13%7D+%7D+)
![\frac{-11*13}{9*-8} \frac{-11*13}{9*-8}](https://tex.z-dn.net/?f=+%5Cfrac%7B-11%2A13%7D%7B9%2A-8%7D+)
![\frac{-143}{-72} \frac{-143}{-72}](https://tex.z-dn.net/?f=+%5Cfrac%7B-143%7D%7B-72%7D+)
vanessa117:
Graciasss!!!!!
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