Question 534531
{{{3&1/4p=2&1/2}}}
{{{(13/4)p=5/2}}}
Multiply by {{{4/13}}} both sides
{{{(4/13)(13/4)p=(5/2)(4/13)}}}
{{{(cross(4)/cross(13))(cross(13)/cross(4))p=(5/cross(2))(cross(4)/13)}}}
{{{p=(5)(2/13)}}}
{{{p=10/13}}}