Bear Bus Hat Puzzle | with Answer

Bear Bus Hat Puzzle

ANSWER
9 is the answer

Explanation
Equation 1: 7 + 7 + 7 = 21 (Bear = 5 ; from equation 3)
Equation 2: 6 + 6 + =7 = 19 (Bus = 1; from equation 3)
Equation 3: 2 + 6 + 7 = 15 (Hat = 2)
Equation 4: 5 + (2+2) x 1 = 9 (There are two hats in this equation)