Jawabanmu

2014-06-01T08:36:10+07:00
3/2p= 90 - p
3/2p + p = 90
5/2p = 90
p = (90 x 2) / 5
p = 36
1 4 1
2014-06-01T08:36:41+07:00
P= 3/2 (90-p)
2p = 3(90-p)
2p = 270 - 3p
5p = 270
p = 54

jadi susut p = 90 - 54
= 36
2 5 2