2x+3y+7z=13 3x+2y-5z=-22 5x+7y-3z=-28

2x+3y+7z=13 3x+2y-5z=-22 5x+7y-3z=-28

2x+3y+7z=13 3x+2y-5z=-22 5x+7y-3z=-28

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