Answer: YES!
Explanation:
First Box: x
Second Box: (x + 9) - 4 = x + 5
Third Box: x + 9
Total: 59
First Box + Second Box + Third Box = Total
x + x + 5 x + 9 = 59
3x + 14 = 59
-14 -14
3x = 45
÷3 ÷3
x = 15
Since 15 is a whole number (not a fraction), then it is possible.