Question 393146
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Hi
'Solving for x'
 {{{ y=(1-sqrt(x))/(1+sqrt(x)) }}}
 {{{ y(1+ sqrt(x)) = 1-sqrt(x)}}}
  {{{ y + y*sqrt(x) = 1-sqrt(x)}}}
    {{{ y*sqrt(x) + sqrt(x) = 1-y}}}
     {{{sqrt(x)(y + 1) = 1-y}}}
   {{{ sqrt(x) = (1-y) /(y+1)}}}
         x  = [(1-y) /(y+1)]^2