Decrease at the end of a row?

I have a pattern that asks for a decrease like a cast off at the beginning and end of each row. I know how to do it at the beginning of a row - but at the end? Help!

You can’t cast off at the end of a row, you’ll have to do it at the beg of the next row, and that’s perfectly fine, many patterns are like that. If it’s only 1 stitch, then you can sub a regular decrease, but if it’s 2 or more, you would need to bind off.