Question 632373
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
{{{1/y=(x-4)/x }}}   |Multiplying thru by x so as all denominators = 1
 {{{x/y = x-4}}}
 {{{4 = x - x/y}}}
 {{{4 = x(1 - 1/y)}}}
{{{4/(1-1/y) = x}}}  |multiplying denominator and numerator by y
{{{4y/(y-1) = x}}}