SOLUTION: hmmm ., actually this not a question ., i just don't understand how to define a parallel and perpendicular line ., i dunno how to solve it ., please help me.! i searched many sites
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Linear-equations
-> SOLUTION: hmmm ., actually this not a question ., i just don't understand how to define a parallel and perpendicular line ., i dunno how to solve it ., please help me.! i searched many sites
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Question 210037: hmmm ., actually this not a question ., i just don't understand how to define a parallel and perpendicular line ., i dunno how to solve it ., please help me.! i searched many sites but i still can't get it ., Answer by nyc_function(2741) (Show Source):