4y–4x–8–y=0
y(1–x)=–9
3y–4x–8=0
y=(–9)/(1–x)
(–27)/(1–x)–4x–8=0
(–27–4x+4x^2–8+8x)/(1–x)=0
(4x^2+4x–35)/(1–x)=0
1–x=0 (не равно 0)
х=1 (не равно 1)
4x^2+4x–35=0
Д=/16–4*4*(-35)=/576=24
х1=(–4+24)/8=2,5
х2=(–4–24)/8=–3,5
у1=(–9)/(1–2,5)=6
у2=(–9)/(1+3,5)=–2