Question

A total of

Answer 1

S=51+a  and we are told that:

a+s=601, using s found above in this equation you get:

a+51+a=601

2a+51=601

2a=550

a=275

So 275 adult tickets were sold.

Answer 2

601 (total tickets) - 51 (difference between 2 types of tickets) divided by 2 (number of types of tickets):

(601-51)/2 =
550/2=275