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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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Which expression is equivalent to 28 + 7? Prove your answer by showing your work.
OverLord2011 [107]

Answer:

ok so first lets find the answer to the original question

28+7=35

so lets find which one is equal to 35

7(4+1)=28+7=35 yes

4(7+1)=28+4=32 no

4(7+3)=28+12=40 no

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a is the answer

Hope This Helps!!!

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2 years ago
What would rate be equal to?
elena55 [62]

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3 years ago
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kenny6666 [7]

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x=7.8

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Read 2 more answers
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