Question 230512
x+y+z=5
x-y+z=1 multiply by -1 & add
-x+y-z=-1
x+y+z=5
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2y=4
y=4/2
y=2 ans.
x-z=y+3
x-y-z=3
x+y+z=5 add
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2x=8
x=8/2
x=4 ans.
4+2+z=5
6+z=5
z=5-6
z=-1 ans.