SOLUTION: Please help me solve this 4x4 equation w+x+y+z=2 2w-x-y+2z=7 2w+3x+2y-z=-2 3w-2x-y-3z=-2

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Question 999480: Please help me solve this 4x4 equation
w+x+y+z=2
2w-x-y+2z=7
2w+3x+2y-z=-2
3w-2x-y-3z=-2
Found 2 solutions by stanbon, MathLover1:
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
w+x+y+z=2
2w-x-y+2z=7
2w+3x+2y-z=-2
3w-2x-y-3z=-2
-----
Use any method to get:
w = 1
x = 0
y = -1
z = 2
------
Cheers,
Stan H.
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Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

..................eq.1
..................eq.2
..................eq.3
..................eq.4
-----------------------
..................eq.1
..................eq.2
------------------add




...............1a
.....................eq.3..multiply by
......................eq.4.multiply by
-------------------------------------------


--------------------------------add


............substitute from 1a


.............1b
go to
..................eq.1, subst. from 1a and from 1b




...............1c
go to
.........eq.3, substitute from 1a , from 1b, and from 1c
............solve for







go to 1a substitute



go to 1b substitute
.............1b



go to 1c substitute
...............1c



so, your solutions are:






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