Solve using Gauss-Jordan elimination. X1 - X2 + 0.3 X3 - - 4x, + 7x2 - 3x3 + 3X4 = 8x3 - 4x4 = X4 = %3D 1 3x1 + 3.5 4x1 - 3x2 + 2x3 + X4 = - 3.1 Select the correct choice below and fill in the answer box(es) within your choice. The unique solution is x1 O A. (Simplify your answers.) |, X3 = and x4 %3D %3D %3D %3D and x4 = t. The system has infinitely many solutions. The solution is x, = , x2 =, X3 = В. (Simplify your answers. Type expressions using t as the variable.) The system has infinitely many solutions. The solution is x, =, x2 = X3 = s, and xA =t. OC. (Simplify your answers. Type expressions using s and t as the variables.) O D. There is no solution.

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