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Let  X, Y and  Z be points such that xz/yz=zy/xy=1/2. If xy=(1,7), z=(-1,-7) then what is the sum of the coordinates of X? 

 Apr 4, 2021
edited by Guest  Apr 4, 2021
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The sum of the coordinates of X is -17.

 Apr 4, 2021

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