To solve this problem arithmetically, the first step is to define variables for the cost of the adult and child tickets.
- Let \( A \) be the cost of one adult ticket.
- Let \( C \) be the cost of one child ticket.
According to the problem, we know that:
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The total cost equation for the tickets is: \[ 3A + 3C = 75 \]
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Additionally, we know that the cost of each child ticket is $3 less than the cost of an adult ticket: \[ C = A - 3 \]
Now, you can use these equations to find the values of \( A \) and \( C \).
The first step, therefore, would be to express \( C \) in terms of \( A \) using the second equation and substitute it into the first equation.
In summary, the equations defined in terms of variables represent the first step in solving the problem.