(x+5)(y+2)=12
3*(x+3)-5y=-7
xy+2x+5y+10=12
3x+9-5y=-7
xy+2x+5y=2
+
3x-5y=-16
xy+5x=-14
x*(y+5)=-14
x=-14/(y+5)
(x+5)(y+2)=12
(-14/(y+5)+5)(y+2)=12
((-14y+5y+25)/(y+5))(y+2)=12
(11+5y)(y+2)=12y+60
11y+22+5y^2+10y=12y+60
5y^2-9y-38=0
D=29^2
y1=(9+29)/10=38/10=3.8
y2=(9-29)/10=-2
x1=-14/(3.8+5)=-14/8.8
x2-14/3