jawab no 32 sma 30 aja pake cara

32. dicari dulu x nya
4x - 4 + 2x + 7 = 180
6x = 177
x = 177/6 = 29,5

nah terus dicari sudut CBQ , 4(29,5) - 4 = 114
baru deh sudut CBD 
= 180 - 114 
= 66. (c)

30. 40 + 5x + 3x = 180
8x = 140
x = 140/8
x = 17,5

Sudut ABD 
= 40 + 5(17,5)
= 40 + 87,5 
= 127, 5 (c)