14/X-12/(X-2)=3% 令y=x-1则x=y+1，x-2=y-1代入得14/(y-1)-12/(y+1)=0.0314(y+1)-12(y-1)=0.03(y-1)(y+1)14y+14-12y+12=0.03(y²-1)2y+26=0.03y²-0.030.03y²-2y-26-0.03=0y²-200y/3-2603/3=0下面你自己应该可以了吧
