\(x=\left(\dfrac{1}{2}\right)^3:\left(\dfrac{1}{2}\right)=\left(\dfrac{1}{2}\right)^{3-1}=\left(\dfrac{1}{2}\right)^2=\dfrac{1}{4}\)
a) \(\dfrac{1}{2}.x=\left(\dfrac{1}{2}\right)^3\)
\(\dfrac{1}{2}.x=\dfrac{1}{8}\)
\(x=\dfrac{1}{8}:\dfrac{1}{2}\)
\(x=\dfrac{1}{4}\)