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So if |x|=0, then 0=0 right? And also, |x|-7=50, you would +7 to both sides, so |x|=50, ao again, 50=50 right?
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Lauren134

by Lauren134 at October 21, 2009

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x=0,0 for the 2nd problem: x=57 or -57

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leeseuh

leeseuh October 22, 2009