Answer:
The number of adults tickets sold was 894 and the number of children tickets sold was 335
Step-by-step explanation:
Let
x ----> the number of adults tickets sold
y ----> the number of children tickets sold
we know that
x+y=1,229 -----> equation A
35x+27y=40,335 ----> equation B
Solve the system by graphing
Remember that the solution is the intersection point both graphs
The solution is the point (894,335)
see the attached figure
therefore
The number of adults tickets sold was 894 and the number of children tickets sold was 335