I love class 7a
19/05/2018 at 01:30-
Huy Toàn 8A (TL) 19/05/2018 at 01:42
We have:
\(\left|\dfrac{2}{7}-\dfrac{1}{6}+x\right|>_-0\)
and \(-\dfrac{9}{4}-\left|y\right|< _-0\)
=> x, y does not exist
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