Jawabanmu

2014-03-23T18:44:41+07:00
1/4x + x = 180
1/4x + 4/4x = 180
5/4x = 180
x = 45
Sebelumnya maaf kalo salah ^_^
2014-03-23T18:45:55+07:00
Misal <A
<A = 4(180 - <A)
<A = 720 - 4<A
<A + 4<A = 720
5<A =720
<A = 720/5
<A = 144 DRAJAT