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2014-11-18T15:18:52+02:00
7x(a+b)-5xc=7x480-5x90=3360-450=2910
marcheaza-l daca e cel mai bun.multumesc!
multumesc
2014-11-18T15:19:51+02:00
A+b=480
c=90
7xa+7xb-5xc=7(a+b)-5c=7x480-5x90=3360-450=2910