Question 1081789
 L = 3W
2L + 2W = 112 ft
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Subs top eqn into bottom:
  2(3W) + 2W = 112
  8W = 112
    W = 14 —>  L = 3(14) = 42
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  Ans: {{{highlight( W = 14)}}} ft and  {{{ highlight(L = 42) }}} ft

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 Check:  2(14) + 2(42) = 28 + 84 = 112  (ok)