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aflati nr x si y stiind ca x+y=72,iar x-y=18;x-y=873,iar x:y=

Răspuns :

x+y=72=>x=72-y   am aflat ca y=27 atunci x=72-y=>x=72-27=45
x-y=18=>72-y-y=18=>72-2y=18=>-2y=-54=>y=27

raspunsuuul este 27 jdjedwwouyyut