Tìm x \(\in\) Z biết :
a, \(4\dfrac{3}{5}\) . \(2\dfrac{4}{23}\) \(\le\) x \(\le\) \(-2\dfrac{3}{5}\) : \(1\dfrac{6}{15}\)
b, \(-4\dfrac{1}{3}\) . \(\left(\dfrac{1}{2}-\dfrac{1}{6}\right)\) \(\le\) x \(\le\) \(\dfrac{-2}{3}\) . \(\left(\dfrac{1}{3}-\dfrac{1}{2}-\dfrac{3}{4}\right)\)