Jawabanmu

2014-04-01T10:42:35+07:00
6x + 4x + 36 +12 = 180 10x + 48 = 180 10x = 180 - 48 10x = 132 x = 13.2
2014-04-01T15:27:45+07:00
2 sudut saling bertolak belakang adalah sama besar
6x + 36 = 4x + 12
6x - 4x + 36 - 12 = 0
2x + 24 = 0
x + 12 = 0
x = -12