题目内容：

（x+1分之3x减x-1分之x）除以x的平方减1分之x-2会的帮算下要过程

优质解答

[3x/(x+1)-x/(x-1)]÷(x-2)/(x^2-1)
=(2x^2-4x)/(x^2-1)÷(x-2)/(x^2-1)
=2x(x-2)/(x-2)
=2x