# Math

When you subtract 2 from a number, double the difference, and then add 7 you get 57. What is the number? And any explanation. Thank you

1. 👍 0
2. 👎 0
3. 👁 97
1. First off you do 57 - 7 which equals to 50. Then you take that 50 and divide it was 2 to get you 25. Now take 25 and add it to 2 to give you your final answer of 27.

1. 👍 0
2. 👎 0
2. Let the number be x

2(x-2) + 7 = 57
2x - 4 = 50
2x = 54
x = 27

1. 👍 0
2. 👎 0
posted by Reiny

## Similar Questions

1. ### Algebra

Hello all! I had a quick homework question: I have to prove that the output of this always ends up as 1, regardless of the starting number: *Think of a number between 1 and 10. Add 1; double the result; add 3; subtract 4; add 5;

asked by y912f on June 21, 2014
2. ### Math

Add one to a number, then double the sum, and you get 56. how do i solve it and write it as a equation (x+1)*2=56 1. divide both sides by 2 2. subtract 1 from both sides you get x=27 For all of these questions just remember that

asked by Steve on January 20, 2007
3. ### Math 213 Elementary Math

20. Think of a number. Add 7. Double the result. Subtract 8. Double the result. Add 12. Divide by 4. Subtract 6. Your answer will be the original number. Explain how this trick works.

asked by Shay on August 7, 2009
4. ### elementary

Think of a number. Add 7. Double the result. Subtract 8. Double the result. Add 12. Divide by 4. Subtract 6. Your answer will be the original number. Explain how this trick works.

asked by Mary on October 31, 2009
5. ### math

When you subtract 2 from a number double the difference and then add 7 you get 57. What is the number

asked by miya on February 1, 2012
6. ### math

When you subtract 2 from a number, double the difference, and then add 7, you get 57. What is the number?

asked by miah on February 22, 2011
7. ### math

when you subtract two from a number double the difference and then add 7 you get 57 what is the number

asked by Anonymous on February 2, 2014
8. ### arithmetic

How does this work “Think of a #. Add 7. Double the result. Subtract 8. Double the result. Add 12. Divide by 4. Subtract 6. Your answer will be the original number.

asked by sam on January 21, 2010