Question 955401
{{{WX+XY+YZ=WZ}}}
{{{16+XY+16=40}}}
{{{XY=8}}}
So then,
{{{D=WX+(1/2)XY+(1/2)XY}}}
{{{D=16+8}}}
{{{D=24}}}
So
{{{R=(1/2)D}}}
{{{R=(1/2)24}}}
{{{R=12}}}