Let the number of student tickets sold be \( x \) and the number of adult tickets sold be \( y \).
We can set up the following equations based on the information provided:
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The total number of tickets sold: \[ x + y = 101 \]
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The total revenue from ticket sales: \[ 1x + 2.5y = 164 \]
Now, we can solve these equations step by step.
First, let's solve for \( y \) in terms of \( x \) using the first equation: \[ y = 101 - x \]
Next, substitute this expression for \( y \) into the second equation: \[ 1x + 2.5(101 - x) = 164 \]
Distributing the 2.5: \[ x + 252.5 - 2.5x = 164 \]
Combining like terms: \[ -1.5x + 252.5 = 164 \]
Now, isolate \( x \): \[ -1.5x = 164 - 252.5 \] \[ -1.5x = -88.5 \] \[ x = \frac{-88.5}{-1.5} = 59 \]
Thus, the number of student tickets sold is \( x = 59 \).
Now, let's find \( y \): \[ y = 101 - x = 101 - 59 = 42 \]
To verify, we can check the total ticket sales: \[ 1(59) + 2.5(42) = 59 + 105 = 164 \]
Both conditions (total tickets and total sale amount) are satisfied.
Therefore, the number of student tickets sold is \( \boxed{59} \).