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The real numbers $x$, $y$ and $z$ satisfy the equations $x + 2y + 3z = 950$ and $3x + 2y + z = 1450$. What is the average of $x$, $y$ and $z

 Sep 1, 2022
 #2
avatar+33151 
+1

Add the two equations together.  Divide both side of the result by 4 to get x+y+z, then divide by 3 to get the average.

 Sep 1, 2022

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