Puzzle: Strike a match to solve this equation

Watch the video: Strike a match to solve this equation.

Something’s gotten mixed up in this equation.
However, if you only knock over one of the matches, the calculation adds up again.
This riddle isn’t easy, can you still solve it?
If you flip this matchstick, the plus becomes a four.
5 + 545 equals 550.
And so the equation is correct and the puzzle solved.
Did you know?

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