SOLUTION: x + z = -2 x + y + 4z = -1 2x + 2z + w = -1

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Question 1073439: x + z = -2
x + y + 4z = -1
2x + 2z + w = -1
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
w=3


system%28x%2Bz=-2%2Cx%2By%2B4z=-1%29

subtract first from second.
y%2B3z=1
3z=1-y
z=%281-y%29%2F3

system%284x%2B4z=-8%2Cx%2By%2B4z=-1%29
3x-y=-7
3x=y-7
x=%28y-7%29%2F3


system%28x=%28y-7%29%2F3%2Cy%2Cw=3%2Cz=%281-y%29%2F3%29
Infinite solutions, and any real value for y is possible.