Let's denote the regular price of each ticket as \( p \). Since tickets are on sale for $1.50 off the regular price, the sale price of each ticket can be represented as \( p - 1.50 \).
Dea buys 6 tickets at this sale price, and her total cost is $51. We can write the equation representing this situation as:
\[ 6 \times (p - 1.50) = 51 \]
Now, we can simplify this equation:
- Distribute the 6:
\[ 6p - 9 = 51 \]
- Add 9 to both sides:
\[ 6p = 51 + 9 \]
\[ 6p = 60 \]
- Divide by 6:
\[ p = 10 \]
Thus, the regular price of each ticket is \( p = 10 \).
Conclusion:
The regular price of each ticket is $10. This means that with the $1.50 discount, the sale price of each ticket is $8.50.