Move two lines to make the equation true.
As always, no inequality symbol (≠), adding, and subtracting lines. Move the lines only.
To find the answer, you only have to affect one side.
Do not rotate lines as well.
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If you use lateral-thinking, you can
If the left side is Celsius, and the right side is Fahrenheit, then with 3 non-rotation moves on the right side only, you can get 17=63
Since modifications should be limited to one side of the equation, and you can't rotate, we can infer that the 17 will not change (because you must use all 4 verticals, only "8" has 4 verticals, but there aren't enough horizontals).
So if we assume the 17 is constant, there must be some regime where 17 matches some other number. (I'm discounting base32 and base10 for this answer, since 2 moves are required.)
17C equals 62.6F, which if we round up, then 63 can be achieved with 3 non-rotating moves.
My thinking was to move two sticks from the right to the left to get something like this
The "crossed seven" is to be interpreted in the same way as a regular seven.