SOLUTION: Prove: For all real numbers a,b and c, if a+c=b+c, then a=b

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Question 327161: Prove: For all real numbers a,b and c, if a+c=b+c, then a=b
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
You can't prove it.
It an identity that forms the foundation of mathematics.
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It's like saying prove in baseball that 3 strikes are an out.
You can't do it, it's given as a rule.