Question 1042189
Convert all dimensions to inches
[ ft ]  x [ in/ft ] = [ in ]
{{{ 12*12 = 144 }}} in
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Let {{{ x }}} = the length in inches of the shorter piece
{{{ x + 18 }}} = the length of the longer piece in inches
{{{ x + x + 18 = 144 }}}
{{{ 2x = 144 - 18 }}}
{{{ 2x = 126 }}}
{{{ x = 63 }}}
and
{{{ x + 18 = 81 }}}
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The pieces are 63 inches and 81 inches long
check:
{{{ 63 + 81 = 144 }}}
{{{ 144 = 144 }}}
OK