Animal math quiz

3

From the third line we can calculate the value of the cat 🐈:

7 – 3 + 1 = 5 🐈.

From the equation 4 we can calculate the value of the panda 🐼:

🐼 + 🐈 = 9 => 9 – cat = 9 – 5 = 4 🐼

From equation 2 we can calculate the value of the aligator 🐊:

🐊 – 🐼 = 1 => 1 + 4 = 5 🐊

From equation 1 we can find the value of the dog 🐕:

🐊 + 🐊 – 🐕 = 7 => 5 + 5 – 7 = 3 🐕

The value of the dog is 3. So we can replace the question mark with 3.