求几道数学题的解
(1)x+2y=9(2)x:y=3:2(3)2x-2y+z=0(4)2x+3y+z=11y-3z=-5y:z=5:42x+y-z=1x+y+z=65z-x=14x+y+z...
(1)x+2y=9 (2)x:y=3:2 (3)2x-2y+z=0 (4)2x+3y+z=11
y-3z=-5 y:z=5:4 2x+y-z=1 x+y+z=6
5z-x=14 x+y+z=66 x+3y-2z=1 3x-y-z=-2 展开
y-3z=-5 y:z=5:4 2x+y-z=1 x+y+z=6
5z-x=14 x+y+z=66 x+3y-2z=1 3x-y-z=-2 展开
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