Which situation could be represented by the equation - 30+30 = 0? Rita bought a hat for $30. She then bought some headphones for $30. Donna loaned $30 to her brother. He then paid her back $30 the next day. Wen drove 30 miles to the library. She then drove 30 more miles to her college. Mika filled a tank with 30 gallons of water. She then filled the tank with 30 more gallons. O