To find the equation that represents the number of bags Trisha brought (denoted as \( t \)), we start with the information given:
- Each bag of clementines contains 12 clementines.
- Sal brought 4 bags.
- Joe brought 6 bags.
- Together they had 180 clementines.
First, we calculate the total number of clementines brought by Sal and Joe:
- Clementines from Sal: \( 4 \text{ bags} \times 12 \text{ clementines/bag} = 48 \text{ clementines} \)
- Clementines from Joe: \( 6 \text{ bags} \times 12 \text{ clementines/bag} = 72 \text{ clementines} \)
Next, we can express the total number of clementines brought by Trisha. If Trisha brought \( t \) bags, then the number of clementines she brought is \( 12t \).
Now, we can set up the equation for the total number of clementines:
\[ \text{Clementines from Sal} + \text{Clementines from Joe} + \text{Clementines from Trisha} = 180 \]
This becomes:
\[ 48 + 72 + 12t = 180 \]
Combining the constants (48 + 72):
\[ 120 + 12t = 180 \]
Thus, the equation to determine how many bags Trisha brought \( t \) can be written as:
\[ 12t = 180 - 120 \]
This means we can rewrite it as:
\[ t + 10 = 15 \]
So the final equation representing the number of bags Trisha brought is:
\[ t + 10 = 15 \]