SOLUTION: When a number is doubled and then added to 3, the new result is equal to 15 decreased by the original number. Find the number

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Question 996899: When a number is doubled and then added to 3, the new result is equal to 15 decreased by the original number. Find the number
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
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2x + 3 = 15 - x.

3x = 15 - 3,

3x = 12,

x = 4.