Question 916585
{{{ e^(6x) + 6e^(3x)    -    27   =   0 }}} Let a = e^(3x)
a^2 + 6a - 27 = 0
(a+9)(a-3) = 0 tossing out negative solution for e^3x
a = 3 ,  {{{a = e^(3x)}}}
ln(3)/3 = x