7-2х=9х-8х-8
7-2х=х-8
-3х=-15
Х=-15:(-3) х= 5
1)1,2,3,4,5,6,7,8\14<9\14
2)9\16<9\1,2,3,4,5,6,7,8,9,10,11,12,,13,14,15
вроде правильно
12/(x-2)(x²+2x+4)+(x+1)/(x²+2x+4)=4/(x-2)
x≠2
12+(x+1)(x-2)=4(x²+2x+4)
4x²+8x+16-12-x²+2x-x+2=0
3x²+9x+6=0
x²+3x+2=0
x1+x2=-3 U x1*x2=2
x1=-1 U x2=-2