Jawabanmu

2014-02-26T19:54:40+07:00
25-4y=6y+15 25-15=4y+6y 10=10y y=1 HP=(1)
2014-02-26T20:03:46+07:00
25-4y=6y+15 25+15=6y+4y 40=10y y=40:10 y= 4
25-4y=6y+15
-4y-6y=15-25
-10y=-10
y = 1
HP = {1}