Jawabanmu

2014-05-28T15:46:27+07:00
2,3x5= 11,5
x dan y= 11,5:2
xdan y= 5.75
berarti x= 5.75
y= 5.75
2014-05-28T15:51:19+07:00
(2+3+x+y) : 4 = 5
(5+x+y) : 4 = 5
5+x+y = 5 X 4
5+x+y = 20
x+y = 20-5
x+y = 15

rata2 =
(4+5+6+x+y) : 5
(15+x+y) : 5
(15+15) : 5
30 : 5 = 6
jadi, rata2nya adalah 6