A - B = B - A
This statement is very difficult to prove.
Mainly because it's not true . . . unless 'A' happens to equal 'B'.
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You cannot prove it since it is axiomatic. You can get consistent theories (matrix algebra, for example) where ab is not ba.
ab = 8-cDivide both sides by ba = (8-c)/b
BS
A = 1, B = 9
Yes this true at one point in time
I think its BA.