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2014-11-12T20:44:01+02:00
9=a+9+8/3
27=8+9+a
a=10
cam asa

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2014-11-12T20:45:55+02:00
8+9+c supra 3 = 9
8+9+c= 3 x 9
8+9+c= 27
17+c=27
c= 10

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