Question 309491
x+y+z=6
x-y+z=0
x-y-z=-2
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Add eqn 1 and 3:
2x = 4
x = 2
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+y+z = 4 from eqn 1
-y+z = -2 from eqn 2
--------- Add
2z = 2
z = 1
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y = 3