Question 182721
{{{Alfred = 2 * Brother}}}
{{{Alfred - 4 = 4 * (Brother-4)}}}

{{{A = 2B}}}
{{{A-4 = 4B - 16}}}
{{{2B - 4 = 4B - 16}}}
{{{12 = 2B}}}
{{{6 = B}}}
Brother is 6.
Alfred is 2*6 = 12