由(2x-1)/3+(x+3)/2=02(2x-1)+3(x+3)=04x-2+3x+9=07x+7=0,所以x=-1(x²-6x+9)/(x²-9)÷「x-3+(3x-9)/3]-1/(x-1)=(x-3)/(x+3)÷(x-3+x-3)-1/(x-1)=1/2(x+3)-1/(x-1)=(x-1-2x-6)/2(x-3)(x-1)=(-x-7)/2(x-3)(x-1)=(1-7)/2(-1-3)(-1-1)=-6/16=-3/8