To write a linear equation that represents the total number of hair ties (h) based on the number of days that have passed (d), we can use the information given:
- Tommy starts with 5 hair ties.
- Each day, he steals 3 more hair ties.
The total number of hair ties after \( d \) days can be expressed as:
\[ h = 5 + 3d \]
This equation shows that the total number of hair ties \( h \) is equal to the initial amount (5) plus 3 times the number of days (d) that have passed.