What is 4 = 2+2 6 = 3+3 8 = 3+5 10 = 3+7 = 5+5 12 = 7+5 i dont knwo if its possible so just guess if you have to

Students are getting signatures for a petition to increase sports activities at the community center. the number of signatures they get each day is 3 times as many as the day before. the expression 3^6 represents the number of signatures they got on the sixth day. how many signatures did they get on the first day?