So you want to buy a car that costs some money m but you need x amount of money cause of taxes. Which is 25%. So how much money do you need?
If you have learnt algebra its a simple question.
(1-0.25)×x=m
x=m/0.75
Its part of thinking. A key idea is to know what this = means. It means it is the same as. Or you know >, <. You quite often think in terms of amounts, variables and reactions between them. This is algebra.
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