SOLUTION: 4. Sarah thinks of a number, x. She doubles it and subtracts 5. She gets 27. What was her original number?

Algebra ->  Equations -> SOLUTION: 4. Sarah thinks of a number, x. She doubles it and subtracts 5. She gets 27. What was her original number?       Log On


   

Question 1190072: 4. Sarah thinks of a number, x. She doubles it and subtracts 5. She gets 27. What was her original number?

Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
let x equal the original number
2x - 5 = 27
add 5 to both sides of the equaton to get 2x = 32
divide both sides by 2 to get x = 16.
that's the original number.
multiply it by 2 to get 32.
subtract 5 to get 27.