初一三元一次方程难题1./ x:y=3:2[ y:z=5:4\ x+y+z=662.在等式y=ax^+bx+c中,当x=1时,y=-2,当x=-1时,y=20,当x=3/2与x=1/3时,y的值相等,求a,b,c的值.
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