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2014-11-18T21:45:34+02:00
X-suma initiala
In prima zi=x/3
A doua zi=x-x/3=2x/3 ori 1/2+45=2x/6+45=x+135/3(dupa simplificari)
Rezulta ca x/3+x+135/3+105=x
rezulta ca x+x+135+315=3x
x=315+135
x=450 lei

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