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x+y=1394 x-y=194 Dau coroana

Răspuns :

x+y=1394
x-y=194
Le aduni si obții 2x=1588 deci x=794
794+y=1394
y=1394-794
y=600
X+y=1394
 x-y=194
le adunam
 2x=1394+194⇒2x=1588⇒x=794


X+y=1394
y=1394-794
y=600
verificare
x+y=1394
600+794=1394

deci x=794  si y=600