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value of x

by cartera » Sat Feb 07, 2009 11:59 pm
What is the value of xyz?

1. 5x+6y+2z=5
2. x-3y+z=7

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by Alara533 » Sun Feb 08, 2009 1:13 am
IMO E.

Since we have 3 variables, we can't solve it from 2 equations (as no other information is given abt x, y z, such as x,y,xz > 0)