Yes it is, -4 * -1 = 4
Therefore, it is a multiple, but -4 is not a real number, in the sense of having -4 amount of something.
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It is a negative multiple of x.It is a negative multiple of x.It is a negative multiple of x.It is a negative multiple of x.
No, 130 is not a multiple of 4 and 4 is not a multiple of 130.
4
YES, Most, if not all, mathematicians will agree that any number obtained by multiplying 2 by an integer is a multiple of 2. This would include -4 so the answer is yes.
It is: -4--4 = 0