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Ex 2 va rog urgent!!​

Ex 2 Va Rog Urgent class=

Răspuns :

Rezolvare:

y=3

x=6

63+36=99

6-3=3

Mai detaliat:

xy+yx=99

x=y+3

10x+y+10y+x=99

11x+11y=99

x+y=9

x-y=3

x=9+3/2

y=9-3/2

x=6

y=3