Question: a Solve the following linear simultaneous equations, using Cramer's rule to invert the coefficient matrix. x1 .+ 2x2 + 3x3 = -1 4x1 + 7x2

a Solve the following linear simultaneous equations, using Cramer's rule to invert the coefficient matrix. x1 .+ 2x2 + 3x3 = -1 4x1 + 7x2 + 14x3 = 3 X1 + 4x2 + 4x3 = 1 b Solve the following linear simultaneous equations, using row transformations to convert the coefficient matrix to upper triangular form. 2x1+ X2- X3 = 1 x1 + 3x2 + 2x3 = 13 X1 - X2 + 4x3 = 11

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