Jawabanmu

2014-04-20T19:04:16+07:00
2x + 5 + 3x + 25 derajat = 180 derajat
5x + 5 = 180 - 25
5x + 5 = 155
5x = 150
x = 30 derajat 

sudut a = 2x + 5
            = 2(30) + 5
            = 60 + 5
            = 65