In the first line, two oranges equal 10. That means each orange is worth 5.
In the second line, one orange plus one burger equals 14. Since the orange is 5, the burger must be worth 9.
Now most people rush straight to the last line and answer 14 again, because they see one orange plus one burger. But the smart part of the puzzle is checking whether the last burger is exactly the same as the burger in the second line.
If nothing has changed, then the final answer is simple:
orange = 5
burger = 9
5 + 9 = 14
So the correct answer is 14.
That is why this puzzle tricks people so easily. Many expect a hidden difference, but in this version, the burger appears to stay the same, so the answer remains 14.
Solution: 14