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Solve using a graphic calc y+z- 2w=-3 6x - y+ 2z =1 x+ 2y- z=2 x +y+z=0 2x+ 4y+z-3w=-2 14) -5x+2y-3z=11 15) x-4y-7z-w=-19

Solve using a graphic calc

y+z- 2w=-3 6x - y+ 2z =1 x+ 2y- z=2 x +y+z=0 2x+ 4y+z-3w=-2 14) -5x+2y-3z=11 15) x-4y-7z-w=-19

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