SOLUTION: if a number is added to twice the number, the result is -15. what is the number

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Question 422876: if a number is added to twice the number, the result is -15. what is the number
Answer by htmentor(1343) About Me  (Show Source):
You can put this solution on YOUR website!
Let x represent the number.
Then we have
x + 2x = -15 -> 3x = -15 -> x = -5