Solve for "y" using Cramer-exce 3x+4y-2z-w=20 4x-y-z-5w=50 2x-3y-6z+7w=60 x+y+z+2w=70 round to two decimal places

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Q: 14. A = 3 -1 6 1 3 3 3,λ= -4 62

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