5 = 6?

Here is a "proof" that `5` is equal to `6`:

`35+10-41=42+12-50 `

`35+10-45=42+12-54 `

`5*(7+2-9)=6*(7+2-9) `

ׂ`5=6`

Where is the mistake?

Difficulty level (1 very easy - 10 very hard): 1

Arithmetic Algebra -> Equations Number Theory -> Division

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