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Yes you can. You are right, but it is better to have a simple formula to calculate it for you to avoid complexity, and to improve your math thinking skills.
I also did it in a similar manner to you, but thought it better to look for a formula.
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Yes you can. You are right, but it is better to have a simple formula to calculate it for you to avoid complexity, and to improve your math thinking skills.
I also did it in a similar manner to you, but thought it better to look for a formula.