bantuinnnnn dongggggg

6x + 12 + 3x + 15 = 180
9x + 27 = 180
9x = 180-27
9x = 153
x = 17
rqs = 3x + 15
rqs = 3.17 + 15
rqs = 66
penyiku rqs = 90 - rqs
penyku rqs = 90-66 = 24

jawabannya 24