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3x+2y=-11 ; 6x-4y=9by Cramer's rule find x and y |
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Answer» DxDy=cbac 3x+2y=-11------------(1) 6x-4y=9-------------(2) COMPARE eq 1 by 3 and eq 2 by 4 a1x+b1y=c1------------(3) a2x-b2y=c2-----------(4) a1=3, b1=2, c1=-11 a2=6, b2=-4, c2=9 Dx=|c1 b1| =|-11 2| =-11×4-2×9=-44-18=-62 |c2 b2| |9 4| Dy |
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