tolong dikerjakan ya besok dikumpul no 1

90 = 2a + 3a
a = 18

180 = 46 + (a + 29) + (5a + 15)
180 - 90 = 6a
90 = 6a
15 = a

1. a) 3a+2a= 90°
5a=90°
a=90/5
=18
b)46° + (a + 29 )° + (5a +15)°= 180°
6a + 90°= 180°
6a= 180-90=90°
a=90/6
=15