EAMCET Engineering 2003 Solved Paper

Given that,
2x+y−z=7 . . . (i)
x−3y+2z=1 . . . (ii)
x+4y−z=5 . . . (iii)
and
From Eqs. (i) and (ii),
5x−y=15 . . . (iv)
From Eqs. (i) and (iii),
5x−y=16 . . . (v)
Equation (iv) and (v) shows that they are parallel and solution does not exist.