Has there been a time where knowing even the simplest rules of algebra helped you in your daily life?
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I find algebra helpful any time I need to determine an unknown quantity, from how long it will take me to get somewhere to the amounts of ingredients necessary to increase the number of servings in a recipe.
I'd say it depends on your life situation and job. I don't need it on my day to day life but someone else might find it quite helpful. I mean I sometimes calculate certain things but nothing special :)