Question 1062043
  {{{ 2000 = 10000(1+0.0576/12)^(12x) }}}
  {{{ 2000/10000 = (1+ 0.0576/12)^(12x) }}}
 {{{  0.20 = (1.0048)^(12x) }}}
  {{{ ln(0.20) = (12x) ln(1.0048) }}}
  {{{ ln(0.20)/ln(1.0048) = 12x }}}
  {{{  -336.10364 = 12x }}}
  {{{    x = -28.00864 }}}

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Ans:  x = -28.00864 
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Check:
      10000*(1+0.0576/12)^(12*-28.00864)
    = 10000*(1.0048)^(-336.10368)
    = 10000*(0.2)
    = 2000   (ok)