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If $888x + 889y = 890$ and $891x + 892y = 893$, what is the value of $x - y$ ?

 Feb 2, 2022
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Subtract the first equation from the second one, term by term, to get a nice simple expression for x + y.  Rearrange this to get y in terms of x and substitute the result back into one of the two original equations.

 Feb 2, 2022

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