Posted by Cece on .
system of equations:
solve the following system of operations using matrices (row operations)
{5x + y + z + w = 5}
{x  2y + 2z 3w = 4}

college math 
Steve,
2 equations
4 unknowns
no single solution. 
college math 
Cece,
I need more than that. What are the values of "x"
I worked out the values of "y" to be:
y = (15/11) + (9/11z)  (16/11w), but I could be wrong 
college math 
Steve,
oh, well, if that's the kind of solution you want, then it's ok.
Eliminating x, I get
5x+y+z+w = 5
5x10y+10z15w = 20
11y9z+16w = 15
so your answer looks good to me. 
college math 
Cece,
so are you saying that "x" is 15?

college math 
Steve,
No. I used your answer and showed that no matter what x,z,w are, the expression you got will work for y. We eliminated x, remember?