Posted by Vee on Thursday, January 31, 2013 at 10:59am.
Solve the system of equations by first writing it in matrix form and then using GaussJordan elimination.
x4y =5
2x + 9y = 125

algebra  PsyDAG, Thursday, January 31, 2013 at 5:35pm
I don't know if I am using the same form or "GaussJordan" elimination.
2x  8y = 10
2x + 9y = 125
Add the two equations.
y = 115
Insert that value into the first equation and solve for x. Check by inserting both values into the second equation. 
algebra  Vee, Thursday, January 31, 2013 at 8:35pm
Thank you greatly!