287*a+82*b+14*c=2009___________________ii dam lui a valoarea 3__________ ___=>287*3+82*b+14*c=2009_________ ___=>861+82*b+14*c=2009__________ ___=>82*b+14*c=2009-861=1148_____ ____ii dam lui b valoarea 7___________ ____=>82*7+14*c=1148______________ ____=>574+14*c=1148_____________ _____=>14*c=1148-574_____________ ________=>14*c=574 __=>c=574:14=41
