Tìm x \(\in\) Z để A \(\in\) Z

\(a,A=\dfrac{x+5}{x+2}\)

\(b,B=\dfrac{x+4}{x-3}\)

Tìm x \(\in\) Z để A \(\in\) Z

\(c,C=\dfrac{2x-1}{x+2}\)

\(a,-1,5.\dfrac{-2}{25}\)

\(b,1\dfrac{3}{5}.\dfrac{-3}{4}\)

\(c,\dfrac{-15}{4}:\dfrac{21}{-10}\)

\(d,\left(-2\dfrac{1}{7}\right):\left(-1\dfrac{1}{14}\right)\)

\(e,-3,5.\dfrac{-4}{21}\)

\(f,1\dfrac{2}{3}.\dfrac{-7}{3}\)

\(g,\dfrac{-5}{2}:\dfrac{3}{-4}\)

\(h,\left(-8\dfrac{2}{5}\right):\left(-2\dfrac{4}{5}\right)\)

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