It’s used in many many different ways, but it doesn’t mean people carry an algebra textbook with them all the time.
Virtually any profession uses (mostly simple) algebra on a daily basis.
Even in your non-professional daily life you use it all the time, for example, when you do the shopping for the month, you either use statistics (last month I bought x amount and it was enough) or algebra (I use x amount per serving, I have y servings per week, a month has 4 weeks, therefore I need 4*y*x amount).
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