Question 239526
 Solve for X, Y, and Z in the following systems of three equations using either substition or elimination methods:
X + 2Y + Z = 6
X + Y = 4
3X + Y + Z = 8 
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Eliminate one variable in 2 of the eqns by getting the same coefficients and eliminating.
Eliminate x
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X + 2Y + Z = 6
X + Y = 4
--------------- Subtract
0x + y + z = 2 Eqn A
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X + Y = 4 times 3 --> 3x + 3y = 12
3X + Y + Z = 8 
3x + 3y + 0z=12
----------------- Subtract
0x - 2y + z = -4 Eqn B
0x + y + z = 2 Eqn A
--------------- Subtract
-3y = -6
y = 2
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z = 0
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x = 2
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