Answer:
325
Explanation:
The number of adult tickets sold is half the total plus half the difference, so is ...
... (597 +53)/2 = 325
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You can write an equation for the number of adult tickets (a) as ...
... a + (a -53) = 597
... 2a = 597 +53 . . . . . simplify, add 53
... a = 650/2 = 325 . . divide by 2