(4 - r) is.
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The negative of a negative number is a positive number. The reason for this is that the first negative is a place holder for -1. When you have - - 4, that translates into -1 x -4. When you multiply two negative numbers, you get a positive.For example:- - 7 = -1 x -7 = 7- - r = -1 x -r = r
-4 minus -34 is 30
It is: -4--4 = 0
Seven minus negative two times negative 4 is equal to -1
-15 minus -4 is -11.