A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new numbers becomes twice the other new number. What are the numbers?

Let the numbers be x and 5x
Then,

Thus, one number is 7 and the other number is 35.

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Question

A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new numbers becomes twice the other new number. What are the numbers?

Philoid · Accepted Answer

Let the numbers be x and 5x

Then,

Thus, one number is 7 and the other number is 35.