<PRE><B>Question 370212</B>
2x-3y-z=15
2x+3y+z=1
2x+3y-z=3
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Use elimination
2x-3y-z=15
2x+3y+z=1
---------- Add
4x = 15
x = 4
------
2x-3y-z=15
2x+3y-z=3
----------- Add
4x - 2z = 18
16 - 2z = 18
z = -1
--------
2x+3y+z=1
8 + 3y - 1 = 1
3y = -6
y = -2
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Most are not this easy.
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