Answer to Question #75210 in Math for Alice

Question #75210

solve the system of equations
2x1 +3x2 +4x3 +x4 =3
x1 +2x2 +x4 =2
2x1 +3x2 +x3 -x4 =1
x1 -2x2 -x3 +4x4 =5
using Gauss elimination method with pivoting.

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