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Daca 3/x=y/8, determinati valoarea expresiei 245-2xy

Răspuns :

xy=8x3
xy=24
2xy=2x24=48

245-2xy=245-48
245-2xy=197
3/x=y/8 =>xy=24
245-2xy=
=245-2x24
=245-48
=197