Systems of equations word problems

A herd of dinosaurs made paintings in the sand with their claws. Each baby dinosaur made $15$ paintings and each adult dinosaur made $7$ paintings. The entire herd made $208$ paintings in total, and there were $3$ times as many baby dinosaurs as adult dinosaurs. **How many baby dinosaurs and adult dinosaurs were there?** There were [[☃ math-keypad 1]] baby dinosaurs and [[☃ math-keypad 2]] adult dinosaurs.