2x+9/x+3-(1/x-3)-2/x的值等于2
2+3/(x+3)-1/(x-3)-2/x=2
3/(x+3)=1/(x-3)+2/x
3x(x-3)=x(x+3)+2(x+3)(x-3)
3x^2-9x=(x^2+3x)+(2x^2-18)
12x=18
x=3/2