Question 937146
Let {{{ x }}} be one part and
{{{ 54 - x }}} be the other part
{{{ ( 1/12 )*( x - ( 54 - x ) ) = 1/3 }}}
Multiply both sides by {{{ 12 }}}
{{{ x - ( 54  - x ) = 4 }}}
{{{ x - 54 + x = 4 }}}
{{{ 2x = 58 }}}
{{{ x = 29 }}}
and
{{{ 54 - x = 54 - 29 }}}
{{{ 54 - x = 25 }}}
----------------
The parts are 29 and 25 
check:
{{{ ( 1/12 )*( x - ( 54 - x ) ) = 1/3 }}}
{{{ ( 1/12 )*( 29 - 25 ) = 1/3 }}}
{{{ ( 1/12 )*4 = 1/3 }}}
{{{ 1/3 = 1/3 }}}
OK