Question

$4 x = \frac{1}{2}$

Answer 1

$4x=\frac{1}{2}\\ \\ 8x=1\\ \\ \boxed{x=\frac{1}{8}}$

Answer 2

$4^{x} = \frac{1}{2}\\\\ 2^{2x} = 2^{-1}\\\\ 2x = -1\\\\ \boxed{x = - \frac{1}{2} }$