x+y-z=2,2x+2y+5z=-3,3x+2y-3z=6 solve by crouts trainglization method

Crouts traingulization method
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By solving equations x+y-z=2 and 2x+2y+5z=-3

we get z=-1

Sub's  this in x+y-z=2 and 3x+2y+5z=-3

By solving  we get y=0

Sub's y,z values  in x+y-z=2 we get x=1

Therefore  (x, y,z)=(1,0,-1,
by

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