Помогите!! 9 класс

16/(х^2 -2х) - 11/х^2-2х = 9/ х^2-2х+1

и вот :

х/(х+2 ) + х+1/(х+5) - 7-х/(х^2+7х+10)= 0

x^2-8x+16+(x+9)^2-2x^2=0x^2-8x+16+x^2+18x+81-2x^2=02x^2-8x+16+18x+81-2x^2=02x^2+10x+16+81-2x^2=02x^2+10x+97-2x^2=010x+97=0x=-97/10x=-9.7