急！！八年级数学分式方程！题目有图！在线等答案！

2)3x/(3x+3)=(5x+3)/(3x+3), (2x+3)/(3x+3)=0,∴x=-3/2,代入分母≠0 3）2（x+1）/(x^2-1)=4/(x^2-1) (2x-2)/(x^2-1)=0,∴x=1,代入分母=0，无解 4）[5x-5-(x+1)]/[x(x+1)(x-1)] =(4x-6)/[x(x+1)(x-1)] =0 ∴x=3/2代入分母≠0