If you do, it's false. Counterexample: n, x is 2, y is 1
2/(2-1) doesn't equal (2+1)/2
This is proof by what? So you only need one instance of a counterexample to prove it's false but you need to use variables to prove something is true. Well I found I found some numbers that made it true and I was going to use it to solve a problem but realized that it might not be true for all numbers and turns out it isn't.
]]>You only need one counter example to prove it is false. Try choosing some numbers for n, x and y.
Bob
]]>= or not =
n+y
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x