Evaluate:
$\frac{7}{13} + \frac{- 4}{39}$

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Solution

Given
$\frac{7}{13} + \frac{- 4}{39}$

$= \frac{7}{13} - \frac{4}{39}$

$= \frac{21 - 4}{39}$

$= \frac{17}{39}$

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