Yang no 24 tolong pake cara Makasih

B = 180 - 115
= 65

180 = 65 + x + 4 + 2x - 6
180 = 63 + 3x
3x = 180 - 63
3x = 117
x = 117 ÷ 3
x = 39

BAC = x + 4
= 39 + 4
= 43 (B)

<ABC= 180-115 = 65

<BAC = 180- <ABC - <ACB
x+4 = 180 - 65- 2x-6
3x = 105
x= 35

<BAC = 35+4=39

hth..
anyway, jawaban terbaiknya yak