Some issues solving linear equation

[ijabbott]

(06-23-2018 06:25 AM)Didier Lachieze Wrote:  

(06-22-2018 01:06 PM)sasa Wrote:  I'm interested what is result of more recent calculators on these synthetic examples, for instance on Prime.

On the Prime in CAS mode :
linsolve([x+y+2*z=-2,3*x-y+14*z=6,x+2*y=-5],[x,y,z])
returns [-4*z+1,2*z-3,z]

linsolve([x-5*y+3*z=-8,0*x+2*y+z=3,0*x+0*y+0*z=7],[x,y,z])
returns: []

TI-Nspire CX CAS in Exact mode:

linSolve({x+y+2·z=−2,x−y+14·z=6,x+2·y=−5},{x,y,z})
returns: { −(4·c1−1),2·c1−3,c1 }

linSolve({x−5·y+3·z=−8,0·x+2·y+z=3,0·x+0·y+0·z=7},{x,y,z})
gives: "Error: Argument Error"