Hi, Is there a formal property of mathematics that states: For any number x, x - x = 0? I know this is true, but I can't remember whether there is a property that defines it. Thanks.
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Originally Posted by absvalue Hi, Is there a formal property of mathematics that states: For any number x, x - x = 0? I know this is true, but I can't remember whether there is a property that defines it. Thanks. 0 is the additive identity , i.e. x + 0 = x
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