Mathematics, 21.08.2019 14:20 montgomerykarloxc24x

When sally picks any number between 1 and 20, doubles it, adds 6, divides by 2 and subtracts 3, she always gets the number she started with. why?

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When sally picks any number between 1 and 20, doubles it, adds 6, divides by 2 and subtracts 3, she...

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