\(\left(x:\dfrac{-5}{6}\right)^3=\left(-\dfrac{7}{6}\right)^3\)
\(=>x=-\dfrac{7}{6}\cdot-\dfrac{5}{6}=\dfrac{35}{36}\)
\(b,\dfrac{1}{12}+\left(x:\dfrac{-5}{6}\right)^3=\dfrac{-325}{216}\)
\(\left(x:\dfrac{-5}{6}\right)^3=\dfrac{-325}{216}-\dfrac{1}{12}\)
\(\left(x:\dfrac{-5}{6}\right)^3=\dfrac{-343}{216}\)
\(\left(x:\dfrac{-5}{6}\right)^3=\dfrac{-7^3}{216}\)
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