Im not sure about this question. Did the witches get any help to get what they want to Macbeth? Lady macbeth could be one of the people who influence on macbeth to do the things he did, not only because the witches told him.
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Yes, L. Macbeth was instrumental in convincing her husband to believe the witches. The witches also get helped by their "trippy" potion and the apparitions that appear. As Macbeth wades further into his own dark desires, the witches need less and less help.