tolong bantu pake cara 5 dan 6

5. 3x + 2x + x + 15 = 180
6x + 15 = 180
6x = 180 - 15
6x = 165
x = 165/6
x = 27.5
A = 2 × 27.5
A = 55

6. 2y + 10 + y + 10 + 40 = 180
3y + 60 = 180
3y = 180 - 60
3y = 120
y = 120 / 3
y = 40
CAB = 40 + 10
CAB = 50