Question

I need help I tried solving it but it was wrong

Answer 1

a child’s ticket costs $19.

c= child a= adult

problem 1:
three adults and four children must pay $136

3a+4c=136
4c=136-3a
c=34-3a/4

now we substitute c

2a+3(34-3a/4)=97
2a+102-9a/4=97
-a/4=-5
a=20

60+4c=136
4c=76
c=19