exam Maths Puzzle Numerical Ability

Use the Gauss-Jordan method to solve each system of equations
3x-6y+3z=11
2x+ y- z =2
5x-5y+2z=6

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exam Other Question

2x+4y=42 2x+3y=36(Cramer Rule)
Find the determinant of the given matrix
[1 0 6 -1]
[-6 0 2 4]
[3 0 6 -2]
[3 4 -3 3]
Write the augmented matrix for the system
9x+2y+9z=8
8x+ Write without using fractions7/10000