line 1...x+2y=9...so 2y=9-x ...or y=-(x/2) +4.5
line 2...2x -5y =-33
line2: 2x -5*(-0.5x +4.5) =-33
2x +2.5x -22.5=-33
4.5x=22.5-33....=-10.5
x=-10.5/4.5...
x=-2.33333333333333333333...
or x=-(7/3)
y=-(x/2) +4.5... -(x/2)=+(7/6)
y=(7/6)+4.5...or (7/6)+(27/6)...=34/6