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Posted by on Thursday, January 31, 2013 at 10:59am.

Solve the system of equations by first writing it in matrix form and then using Gauss-Jordan elimination.

x-4y =-5

-2x + 9y = 125

  • algebra - , Thursday, January 31, 2013 at 5:35pm

    I don't know if I am using the same form or "Gauss-Jordan" 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 - , Thursday, January 31, 2013 at 8:35pm

    Thank you greatly!

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