x/x-1-x-1/x-2=x-3/x-4-x-4/x-5
(1+1/X-1)-(1+1/X-2)=(1+1/X-4)-(1+1/X-5)
1/X-1-1/X-2=1/X-4-1/X-5
通分(X-2-X+1)/(X2-3X+2)=(X-5-X+4)/(X2-9X+20)
6X=18
X=3
注:X2为X的平方
X-1/X-2—X-3/X-4=X-2/X-3—X-4/X-5
(X-2)(X-3)=(X-4)(x-5)
X=7/2
解:x-1=x-5
x=x-6
2x=6
x=3
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