x-2y=03x+2y=8
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x-2y=03x+2y=8x-2y=03x+2y=8x-2y=03x+2y=8x-2y=0x=2y3x+2y=6y+2y=8y=8y=1x=2
x-2y=03x+2y=8
x-2y=0
3x+2y=8
x-2y=03x+2y=8
x-2y=0
x=2y
3x+2y
=6y+2y
=8y
=8
y=1
x=2
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
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12y(x-y)^2-8(x-y)^3=?
x-2y=03x+2y=8
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填空:x-y/x+y=( )/x^2-y^2
(x-y)2•(y-x)³(x-y)=?
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已知x+y/y=11/8,求x-y/x+2y的值.
(x-4y)(2x+y)=