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EastWind [94]
3 years ago
12

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 s

tarted with. why?
Mathematics
2 answers:
Reil [10]3 years ago
7 0
I think it might be because 2 and 3 are factors of 6. 
Ira Lisetskai [31]3 years ago
3 0
Lets say number is x

doubles it (2x)
adds 6 (2x+6)
divide it by 2 (2x+6=2(x+3) so 2(x+3) divided by 2=x+3)
subtract 3 (x+3-3=x)

becasue math is fun, brah
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