Question

Tìm x: \(\left(-\dfrac{1}{3}\right)^3\) . x = \(\dfrac{1}{81}\)

Answer 1

\(\left(-\dfrac{1}{3}\right)^3.x=\dfrac{1}{81}\)

\(\Rightarrow-\dfrac{1}{27}x=\dfrac{1}{81}\)

\(\Rightarrow x=\dfrac{1}{81}:\dfrac{1}{-27}=\dfrac{1}{3}\)

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Answer 2

\(\left(-\dfrac{1}{3}\right)^3.x=\dfrac{1}{81}\\ -\dfrac{1}{27}.x=\dfrac{1}{81}\\ x=\dfrac{1}{81}:\dfrac{-1}{27}\\ x=\dfrac{-1}{3}\)

Answer 3

\(\left(-\dfrac{1}{3}\right)^3.x=\dfrac{1}{81}\)

\(-\dfrac{1}{27}.x=\dfrac{1}{81}\)

\(x=\dfrac{1}{81}:\left(-\dfrac{1}{27}\right)\)

\(x=\dfrac{1}{3}\)