Huy Toàn 8A (TL)
11/07/2018 at 00:26-
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Huy Toàn 8A (TL) selected this answer. -
Đinh Sáng Official 11/07/2018 at 07:41\(\left(\dfrac{1}{2}x-3\right)=\dfrac{1}{2}-3=\dfrac{1}{2}-\dfrac{3}{1}=\dfrac{1}{2}-\dfrac{6}{2}=\dfrac{-5}{2}\)