Answer
$-\frac{13}{10}$
Work Step by Step
$-\frac{7}{10}+(-\frac{3}{5})=-\frac{7}{10}+(-\frac{3\times2}{5\times2})=-\frac{7}{10}+(-\frac{6}{10})=-(\frac{7}{10}+\frac{6}{10})=-(\frac{7+6}{10})=-(\frac{13}{10})=-\frac{13}{10}$
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