if x+y>100 then x>50 or y>50
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Originally Posted by omegatidus if x+y>100 then x>50 or y>50 Suppose that $\displaystyle x\le50~\&~y\le 50$ then $\displaystyle x+y\le~?$
Start by assuming the negation of "x>50 or y>50." Then see if what you get somehow contradicts "x+y>100." If this is too cryptic let me know and I will be a bit more explicit. Good luck!
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