Răspunsuri

2014-04-28T20:51:30+03:00
|----|+7 nr1
|----|nr2   ( 85-7):2=39nr2   39+7=46nr1
2014-04-28T20:52:03+03:00
X+y =85⇒y+7+y=85⇒2y+7=85⇒2y=78⇒y=39
x=y+7⇒x=46