[bongodongobob]

I have a puzzle with no correct solution:

https://gcdnb.pbrd.co/images/T5vHCnVvd3Da.png?o=1

Edit: I read that as 3-x=3. I would assume that when reading up that should be the case. Reading x-3 with = above it doesn't seem intuitive to me.

[mkl]

You have to read the verticals downwards: 3 = x - 3. There's a note about it in the "↓01" button. Otherwise things like 8 - x = 9 - y vertically would be ambiguous.

[junar]

There is a solution. Your 1 and 7 should be swapped.

[l0b0]

Try swapping the 1 and 7 :)