3道分式方程不会!急

题目

3道分式方程不会!急
7/(x²-1) +8/(x²-2x) = 37-9x/(x^3-x²-x+1) ^3是平方3 7/x²-1=x的平方减一分之7
3/(x²+x-2)=x/(x-1)-x/(x+2)
1/(x+3) + 1/(6-2x) =3x-15/(2x²-18)
37是和9x是分子啊

答案

1.那个37是和9x都在分子上么?
2.3/(x+2)(x-1)=x/(x-1)-x/(x+2)
3=x(x+2)-x(x-1)
2x+1=3
x=1
3.1/(x+3)-1/2(x-3)=3x-15/2(x+3)(x-3)
2(x-3)-(x+3)=3x-15
x-9=3x-15
x=3