Question

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 ____ baby dinosaurs and ____ adult dinosaurs.

Answer 1

Baby dinosaurs-12

Adult dinosaurs-4

Step-by-step explanation:

15b+7a=208 where b- baby , a is adult

b=3a

Putting the values

15.3a+7.a= 208

45a+7a =208

52a=208

a=4

b=3a= 12

Answer 2

7x+15(3x)=208
7x+45x=208
52x=208
x=4
adult=4
baby=12