Question

3/7+(-4/9)-(-11/7)-(7/9)=?​

Answer 1

Answer:

$\frac{3}{7} + \frac{ - 4}{9} - \frac{ - 11}{7} - \frac{7}{9} \\ \frac{27 - 28 + 99 - 49}{63} \\ \frac{ - 1 + 50}{63} \\ \frac{49}{63} = \frac{7}{9}$

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