Tìm các số nguyên \(x\) biết:
a) \(\frac{1}{3}+\frac{-2}{5}+\frac{1}{6}+\frac{-1}{5}\le \frac{x}{10}<\frac{-3}{4}+\frac{2}{7}+\frac{-1}{4}+\frac{3}{5}+\frac{5}{7}\)
b) \(\frac{5}{17}+\frac{-4}{9}+\frac{-20}{31}+\frac{12}{17}+\frac{-11}{31}<\frac{x}{9}\le \frac{-3}{7}+\frac{7}{15}+\frac{4}{-7}+\frac{8}{15}+\frac{2}{3}\)
A.a) \(x\in \text{ }\!\!\{\!\!\text{ }-2;\,\,0;\,\,1;\,\,2;\,\,3;\,\,4;\,\,5\}\)
b) \(x\in \text{ }\!\!\{\!\!\text{ }-3;-2;-1;\,\,0;\,\,1;\,\,2;\,\,3;\,\,4;\,\,5;\,\,6\}\)
B.a) \(x\in \text{ }\!\!\{\!\!\text{ }-1;\,\,0;\,\,1;\,\,2;\,\,3;\,\,4;\,\,5\}\)
b) \(x\in \text{ }\!\!\{\!\!\text{ }-3;-2;-1;\,\,0;\,\,1;\,\,2;\,\,3;\,\,4;\,\,5;\,\,6\}\)
C.a) \(x\in \text{ }\!\!\{\!\!\text{ }-1;\,\,0;\,\,1;\,\,2;\,\,3;\,\,4;\,\,5\}\)
b) \(x\in \text{ }\!\!\{\!\!\text{ }-3;-2;-1;\,\,0;\,\,1;\,\,2;\,\,3;\,\,4;\,\,5;\,\,7\}\)
D.a) \(x\in \text{ }\!\!\{\!\!\text{ }-1;\,\,0;\,\,1;\,\,2;\,\,3;\,\,4;\,\,6\}\)
b) \(x\in \text{ }\!\!\{\!\!\text{ }-3;-2;-1;\,\,0;\,\,1;\,\,2;\,\,3;\,\,4;\,\,5;\,\,6\}\)
