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

Question

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] · Answer 1 · 2022-08-04T09:48:48+03:00

Reil [10]3 years ago

7 0

I think it might be because 2 and 3 are factors of 6.

Ira Lisetskai [31] · Answer 2 · 2022-08-04T08:18:03+03:00

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