pikachuommi pikachuommi

12-04-2016
Mathematics

contestada

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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kayleighrocks kayleighrocks

12-04-2016

because you go up twice then you go down twice
hope it helps

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