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2014-05-27T20:11:15+03:00
278+a-489=248
278+a=248+489
278+a=737
a=737-278
a=459
verificare
278+459-489=248


812-486+a=522
326+a=522
a=522-326
a=196 verificare
812-486+196=522

1 5 1
2014-05-27T20:15:15+03:00
278 +a -489= 248
278+a= 248+489
278+a=737
a=737-278
a=459

324+a=522
a=522-324
a=198