Compare the values in Column A and Column B for the solution of the system: 



{ x + y + z = 10

x + y + 2z = 13

x + y + 3z = 16 

Column A = x

Column B = y 



A The value in Column A is greater

B The value in Column B is greater

C The two values are equal 

D The relationship cannot be determined on the basis of the information supplied 

I'm just not sure!!! Thanks!!



Subtracting the first equation from the second gives z = 3



Substituting z = 3 makes all three equations become x + y = 7



So there is no way to tell whether x or y is larger or if they are the same.



For instance, x could be 6 and y 1 or vice-versa or they could both be 3.5



The correct choice is D



Edwin
 

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