Answer :

Answer:

7 years old

Step-by-step explanation:

You would start by going backward. If 13 is 8 less, then you would first add 8. You would have 21. Now all you have to do is divide by three. So your answer would be 7. If you would want to check you could plug it back in. 7 multiplied by 3 is 21. 21 - 8=13

The Answer, 7 years old

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Rewritten by : Barada

Answer:

correct me if im wrong but my answer is x=7, or in other words, 7.

Step-by-step explanation: