解方程:(1)4x+7y=10 (2)x+y-z=0 6x-11y+28=0 x+2y-z=3 2x-3y+2z=5
(1)4x+7y=106x-11y+28=0(2)x+y-z=0x+2y-z=2x-3y+2z=5...
(1)4x+7y=10 6x-11y+28=0
(2)x+y-z=0 x+2y-z= 2x-3y+2z=5 展开
(2)x+y-z=0 x+2y-z= 2x-3y+2z=5 展开
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