Answer
$-\frac{1}{2}$
Work Step by Step
$-\frac{5}{12}+(-\frac{1}{12})=-(\frac{5}{12}+\frac{1}{12})=-(\frac{5+1}{12})=-(\frac{6}{12})=-\frac{6}{12}=-\frac{6\div6}{12\div6}=-\frac{1}{2}$
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