Question 1073439
{{{w=3}}}



{{{system(x+z=-2,x+y+4z=-1)}}}


subtract first from second.
{{{y+3z=1}}}
{{{3z=1-y}}}
{{{z=(1-y)/3}}}


{{{system(4x+4z=-8,x+y+4z=-1)}}}
{{{3x-y=-7}}}
{{{3x=y-7}}}
{{{x=(y-7)/3}}}



{{{system(x=(y-7)/3,y,w=3,z=(1-y)/3)}}}
Infinite solutions, and any real value for y is possible.