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3x-2y=1,(1) 5x+3z=8,(2) 3y-6z=-3,(3) (2)*2, 10x+6z=16(4) (4)+(3), 10x+3y=13(5) (1)*3+(5)*2 x=1,y=1,z=1 x=1 y=1 z=1 服了樓主,看也看出來了,X,Y,Z都等於1 X=Y=Z=1
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