"on their own" or "by their own"

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New Member
Spanish - Argentina
Hi everyone, my question is: Is it "on their own" or "by their own"? The verb is "to set".
"values are set on their own" or "values are set by their own".

Thanks in advance!
  • Florentia52

    Modwoman in the attic
    English - United States
    Please give us the complete sentence, and explain the situation in which you would say it. What do you want your sentence to mean?
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