Solve the following system of equations using matrices. Use Gaussian elimination with back substitution or Gauss-Jordan elimination.

Question

a. 3x1 + 5x2 - 8x3 + 5x4 = -8

b. x1 + 2x2 - 3x3 + x4 = -7

c. 2x1 + 3x2 - 7x3 + 3x4 = -11

d. 4x1 + 8x2 - 10x3+ 7x4 = -10

my answer = B

Answer 1

Hard to type matrices and to line them up properly.

Try this effective applet

http://www.gregthatcher.com/Mathematics/GaussJordan.aspx