Question 419206
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Hi
(2x)^3/4=8
{{{ root(4,(2x)^3) = 8 }}}
{{{(2x)^3 = 8^4 }}}     |Taking both sides of the equation to the 4th power
 8x^3 = 8^4    |8^4 = 8*8*8*8
  x^3 = 8^3
   x = 8

CHECKING our Answer***
 {{{root(4,16^3) = root(4,(2*2*2*2)^3) =  2^3 = 8}}}