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If w, x, y, and z are real numbers satisfying

w + x + y = -2

w + x + z = 4

w + y + z = 29 and

x + y + z = 22

what is xz + yz?

 Jan 2, 2022
 #2
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w = - 41/3

 

x = - 111/3

 

y = 132/3

 

z = 192/3

 

xz + yz = 458/9

 Jan 3, 2022

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