help me please 5points only sry

x----chickens
y----ducks
50x+30y=550
44x+36y=532
x=11-3/5y
44x+36y=532
x=11-3/5y
44(11-3/5y)+36y=532
x=11-3/5y
484+48/5y=532 /*5
x=11-3/5y
2420+48y=2660
x=11-3/5y
48y=2660-2420
x=11-3/5y
48y=240 //48
x=11-3/5y
y=5
x=11-3/5*5
y=5
x=8----chicken
y=5-----duck