Answer:
400 adult tickets and 325 children tickets
Explanation:
first lets make a system of equations
2.50x+1y=1325
x+y=725
x being adult tickets, y being child tickets
2.50x+1(-x+725)=1325
1.50x+725=1325
1.50x=600
x=400
there were 400 adult tickets sold
then x+y=725
400+y=725
y=325
there were 325 children tickets sold