I'm having trouble reading this matrix: 1 0 0 4 -1 0 1 0 2 6 0 0 1 3 2 x1 = -1 x2 = 6 x3 = 2 Is this correct? The 4,2,3 column confuses me.
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Looks like an augmented matrix to me. A matrix of that form generally represents 3 equations with 4 variables. $\displaystyle 1x_1 + 0x_2 + 0x_3 + 4x_4 = -1 $ $\displaystyle 0x_1 + 1x_2 + 0x_3 + 2x_4 = 6 $ $\displaystyle 0x_1 + 0x_2 + 1x_3 + 3x_4 = 2 $
Yes indeed, it had slipped my mind. I totally forgot to isolate the x1,2,3 and bring the free variable to the other side. Thank you.
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