\( t \) e total number of cattie, 30 were bulls, 150 were cows and the rest were calves. How many calves did he buy

To determine the number of calves bought, let's break down the information provided: 1. **Total Number of Cattle**: \( t \) 2. **Number of Bulls**: 30 3. **Number of Cows**: 150 4. **Number of Calves**: This is what we need to find. The total number of cattle is the sum of bulls, cows, and calves. Mathematically, this can be expressed as: \[ \text{Total Cattle} = \text{Bulls} + \text{Cows} + \text{Calves} \] Plugging in the known values: \[ t = 30 + 150 + \text{Calves} \] Combine the bulls and cows: \[ t = 180 + \text{Calves} \] To find the number of calves, subtract the total number of bulls and cows from the total number of cattle: \[ \text{Calves} = t - 180 \] **Answer**: The farmer bought \( t - 180 \) calves.