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The real numbers x,y and z satisfy the equations x+2y+3z=950 and 3x+2y =1450 and y + 3z = 500. What is the average of x, y and z?

 Nov 6, 2022
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Just add the second and third equations,

3x + 3y + 3z = 1950,

x + y + z = 650.

 Nov 7, 2022

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