SOLUTION: If 9 is subracted from a number and this difference is doubled, the result is 12 more than the number, what is the number.

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Question 341853: If 9 is subracted from a number and this difference is doubled, the result is 12 more than the number, what is the number.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the number
9 is subtracted = x-9
it is doubled= 2(x-9)
2(x-9)= x+12
2x-18=x+12
2x-x=18+12
x=30