Помогите пожалуйста решить,очень нужно

1
1)1/(x-1)-3/9x-1)9x+x=1)-1/9x+x+1)=(x+x+1-3-x+1)/(x-1)9x=x=10=
=(x-1)/9x-1)9x+x+1)=(x-1)(x+1)/9x-1)(x+x=1)=(x+1)/(x+x+1)=(x+1)/(x+x+1)
2)(x+1)/9x+x+1) * (x+x+1)=x+1
x=99 99+1=100
2
1)y/x-x/y=(y-x)/xy
2)2-x/y-y/x=(2xy-x-y)/xy=-(x-2xy+y)/xy=-(x-y)/xy
3)(y-x)/xy:[-(x-y)/xy]=(x-y)(x+y)/xy*xy/(x-y)=(x+y)/(x-y)
x=99;y=-1  (99-1)/(99+1)=98/100=0,98
3
1)(x+y)/(x+xy+y)-1/(x-y)+[(x+y)+2y]/(x-y)(x+xy+y)=
=(x-y-x-xy-y+x+2xy+y+2y)/(x-y)(x+xy+y)=(x+xy+y)/(x-y)(x+xy+y)=
=1/(x-y)
2)1/y-1/x=(x-y)/xy
3)1/(x-y)*(x-y)/xy=1/xy
x=2;y=5      1/(5*2)=0,1