Problem 1: Given the system of equations
10x1 + 2x2 - x3 = 27
-3x1 - 6x2 + 2x3 = -61.5
x1 + x2 + 5x3 = -21.5
Solve by Gauss elimination with partial pivoting. Calculate the determinant as par
a) 10
b) 20
c) 30
d) 40