\(2xy-x-6y^2+11y=9< =>2y\left(x-3y+3\right)-\left(x-3y+3\right)+2y-1=5< =>\left(2y-1\right)\left(x-3y+4\right)=5\)
TH1 2y-1=5 <=> y=3
x-3y+4=1 <=> x=6
TH2 2y-1=1<=>y=1
x-3y+4=5 <=> x=4
TH3 2y-1=-1<=>y=y=0
x-3y+4=-5 <=> x=-9
TH4 2y-1=-5
<=>y=-2
x-3y+4=-1 <=> x=-11