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If x, y, and z are real numbers for which

x + y - z = -8

x - y + z = 18

-x + y + z = 30

 

then what is xyz?

 May 17, 2021
 #1
avatar+2205 
0

Try adding 2 equations together, that will isolate one variable and give you the value for them.

 

=^._.^=

 May 17, 2021
 #2
avatar+1496 
+2

If x, y, and z are real numbers for which

x + y - z = -8

x - y + z = 18

-x + y + z = 30

Then what is xyz?

 

2x =10

2y = 22

2z = 48

 

xyz = 1320

 May 17, 2021

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