Jawabanmu

2014-04-10T14:52:14+07:00
<PUR= (x + 5)
<PUT=90 - <PUR
         = 90 -( x + 5 )
         = 85 - x
<PUT=<PTU ====> karna sama kaki
180 = <UPT + <PUT + <PTU
180 = 3x - 5 - x + 85 - x + 85
180 = x + 165
  15 = x