Given the determinants of the following matrices: 40 6 -4 6 2 40 -4 6 2 6 -4 2 6 -4 40 2 6. 40 6. 6 -2 4 30 -2 4 6 -2 4 2 6 -2 30 30 det 49 2 =8, det 3 2 =-16, det 30 =-4, det =0, det 4 =20 10 -3 6 49 -3 6 3 10 -3 3 10 -3 49 3 10 49 -60 -6 8 -9 |-2 -60 8 -9 -2 -6 8 -9 -2 -6 8 -60 -2 -6 -60 -9 Find the (unique) solution to the following system: 2x1+6x2-4x3+6x4 = 40 2x1+6x2-2x3+4x4 = 30 3x1+10x2-3x3+6x4 = 49 -2x1-6x2+8x3-9x4 = -60 X=

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