After riding on the bus, Tran walked 30 minutes to get to her friend’s house. Her total travel time was 4 times as long as the bus ride. What equation does this situation model? Use t for the time of the bus ride.

Let's assume that the time of the bus ride is t minutes.

After getting off the bus, Tran walked for 30 minutes to get to her friend's house.
Therefore, her total travel time is t + 30 minutes.
According to the given information, her total travel time was 4 times as long as the bus ride.
So, the equation that models this situation is t + 30 = 4t.