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Please help with this my please

What is 3--4? I do know it's equal to 3+4 but I always wonder what is this considered to be as it's more easier to use 3+4 then why 3--4 is still be used in maths since we don't use it in real life and plz give me examples for its uses​

User Dshgna
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Answer:

now i dont know if this is the thing your asking but a negative plus a negative is a positive.

User Ben Hawker
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