Challenge 3: A Comma-Separated Excel Formula Opened on a Semicolon System — Solution Walkthrough

What you'd expect to see in the formula bar:

=IF(B2>=50;"Pass";"Fail") — LibreOffice typically translates the
argument separators automatically the moment the Excel file is opened
on a system configured for semicolons, converting the commas from the
original .xlsx formula into the semicolons that system's own Calc
installation actually expects.

Why you likely don't need to manually fix anything:

The argument-separator difference is a DISPLAY/INPUT-level formula
syntax setting tied to locale, not a difference in what the formula
actually means or how it's stored internally — LibreOffice's own file-
opening process already accounts for this translation as a normal part
of reading in a file from a different format/locale context. The
formula's logic (checking whether B2 is at least 50, returning "Pass"
or "Fail" accordingly) is completely unaffected either way; only the
punctuation separating its arguments changes to match whatever the
opening system expects to see and accept.

WHY THIS WORKS AS AN ANSWER
------------------------------
This is the direct, concrete illustration of this chapter's own tip
box: separator differences across a file round-trip are something
LibreOffice generally handles automatically as part of opening the
file, not something the user needs to notice or manually correct
themselves — the underlying reason (locale-dependent separator
settings) is worth understanding, but the practical day-to-day impact
on a typical user is usually none at all.