Question 438331
Let width  = {{{W}}}
Let length = {{{L}}}
given:
{{{46 = 2W + 2L }}}
{{{ L = 2W + 2 }}}
By substitution:
{{{ 46 = 2W + 2*(2W + 2) }}}
{{{ 46 = 2W + 4W + 4 }}}
{{{ 6W = 46 - 4 }}}
{{{ 6W = 42 }}}
{{{ W = 7 }}}
{{{ L = 2W + 2 }}}
{{{ L = 2*7 + 2 }}}
{{{ L = 16 }}}
the length is 16 m