SOLUTION: if four is added to a certain number, the result will be the same as if twice the number is subtracted from 31. what is the number

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Question 662018: if four is added to a certain number, the result will be the same as if twice the number is subtracted from 31. what is the number
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
x = certain number
4+x = 31 - 2x
Group like terms
x + 2x = 31 - 4
3x = 27
Divide both sides by 3
x = 9