Thursday, July 4, 2013

z/20+1/12=z/15-1/10

z/20+1/12=z/15-1/10 

z/20-z/20+1/12+1/10=z/15-z/20-1/10+1/10 

5/60+6/60 = 4z/60-3z/60 

11/60 = z/60 


z=11
:)
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