Challenge accepted! These internet puzzles that look so simple, but that half the people in the comments argue about, are classics.

Intentionally, in case I come across the kind of example you have in mind. It’s usually about the order of operations (multiplication and division before addition and subtraction).

Here’s a little trick for you:

7 + 7 × 7 + 7 × 7 – 7 = ?

Here’s how it’s done (without a calculator and with a cool head): Multiplication and division take precedence: First, we solve these two operations in the middle.

$7 \div 7 = \mathbf{1}$
$7 \times 7 = \mathbf{49}$ Now we put the results together: We write them back in the row.

7 + 1 + 49 – 7
Addition and subtraction from left to right:

7 + 1 = 8

8 + 49 = 57

57 – 7 = 50
The result is 50.

Where do most people make mistakes?

They often simply count from left to right as best they can (7 + 7 = 14, then 14 ÷ 7 = 2, etc.), which is the fastest way to get an A in math.

Did you mean an example like this, or was there another trick with fruits or shoes whose value changes in each row?