Jawabanmu

2014-05-13T08:47:16+07:00
# 5a = 50  --> a = 10
# 5a + 2c = 180 --> 50 + 2c = 180 --> 2c = 130 --> c = 65
# 4b - 2 = 2c --> 4b -2 = 130 --> 4b = 132 --> b = 33