Question 1150152
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Note that the problem does NOT ask you to find the cost of each model plane and each teddy bear.  It only asks you to find the cost of one of each.<br>
With the given information, that makes the solution simple.<br><pre>
   5m +  6t = 162
   6m +  5t = 168
  ----------------
  11m + 11t = 330

  11m/11 + 11t/11 = 330/11

  m + t = 30</pre>
ANSWER: The cost of one model plane and one teddy bear is $30.<br>