SOLUTION: A number is tripled and then decrease by 9. The result is 30. What is the original number?

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Question 934202: A number is tripled and then decrease by 9. The result is 30. What is the original number?
Answer by Horlaye(27) About Me  (Show Source):
You can put this solution on YOUR website!
Let the original number be t
From the sentence
3*t - 9 = 30
3t - 9 = 30
3t = 30+9
3t = 39
t = 39/3
t = 13
Hence the original number = t = 13