Question 1060853
Say the n umber they pick is {{{X}}}.
So Emer's total is,
{{{6X+4}}}
and Beth's total is,
{{{(5+X)*4}}} 
Those totals are equal to each other.
{{{6X+4=4(5+X)}}}
{{{6X+4=20+4X}}}
{{{2X=16}}}
{{{X=8}}}