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a fost răspuns

Suma a II nr=63,39
I nr=de 2 ori mai mare decat al II-lea
I nr=este cu 18,24 mai mare decat al II-lea
DAU COROANA SI URGENT

Răspuns :

x+y=63,39
x=2y
x=y+18,24⇒2y=y+18,24⇒y=18,24
2·18,24+18,24=
3·18,24=54,72
PutereDinu
a) x+y=63,39
   2y+y=63,39
   3y=63,39
   y=63,39:3
   y=21,13
   x+21,13=63,39
   x=63,39-21,13
   x=42,26
Raspuns: x=42,26;  y=21,13.
b) x+y=63,39
    y+18,24+y=63,39
    2y+18,24=63,39
    2y=63,39-18,24
    2y=45,15
    y=45,15:2
    y=22,575
    x+22,575=63,39
    x=63,39-22,575
    x=40,815
Raspuns: x=40,815;  y=22,575.

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