Justice has 3 ferns, 5 palms, and 7 succulent plants in her house. If she wants a total of 24 plants in her home, how many more plants does she need?
Justice currently has 3 + 5 + 7 = <<3+5+7=15>>15 plants in her house
Justice needs 24 - 15 = <<24-15=9>>9 more plants
#### 9