(1)16—x²/12—x—x² (2)已知x+3y-3z=0,x-y-z=0,求x+y+z/3x+2y-z的值!

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(1)16—x²/12—x—x² (2)已知x+3y-3z=0,x-y-z=0,求x+y+z/3x+2y-z的值!
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(1)16—x²/12—x—x² (2)已知x+3y-3z=0,x-y-z=0,求x+y+z/3x+2y-z的值!
(1)16—x²/12—x—x²
(2)已知x+3y-3z=0,x-y-z=0,求x+y+z/3x+2y-z的值!

(1)16—x²/12—x—x² (2)已知x+3y-3z=0,x-y-z=0,求x+y+z/3x+2y-z的值!
m2-3m+2 _ m2-m (m-2)/m 1-(2/m) (m-1)/m

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