SOLUTION: A certain positive number is multiplied by 4, and then the result is subtracted from the original number. The result is 21 less than 0. What is the number?

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Question 1073153: A certain positive number is multiplied by 4, and then the result is subtracted from the original number. The result is 21 less than 0. What is the number?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
N-4N=-21
-3N=-21
Solve for N.