Răspunsuri

2014-06-12T15:56:50+03:00
X  masa unui lantisor, y masa unui inel
4x++4y=40⇒x+y=10
2x=3y⇒x/y=3/2⇒(x+y)/y=(3+2)/2
10/y=5/2⇒y=20/5=4 g cantareste un inel
x=10-y=10-4=6g cantareste unlantisor
2014-06-12T16:53:53+03:00

x-inele

y-lantisoare

4x+4y=40 |:4

x+y=10

2y=3x

x=10-y

2y=3(10-y)

2y=30-3y

2y+3y=30

5y=30

y=6

x=10-6

x=4

verificare

4+6=10