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Question
Simplify : `"x" − "y" − {"x" − "y" − ("x" + "y") −overline("x"-"y")}`
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Solution
`"x" − "y" − {"x" − "y" − ("x" + "y") −overline("x"-"y")}`
= x − y − {x − y − (x + y) − x + y}
= x − y − {x − y − x − y − x + y}
= x − y − x + y + x + y + x − y
= 2x
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