Absolute Value Challenge Problem

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Really interesting to notice that apparent solutions are, in fact, not solutions. Always think about retest, and retest again.

LC
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making 2 cases if x>0, |x|=x, and if x<0, |x|= -x and then solving for x would be much less work to get both the correct values....

chaitanyagoyal
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Please do the 15th question in your site: | x | = - x

Song_In_Room
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How can i be good at maths or solving problems ?

mahouddeye