besar nilai x dan y pada gambar disamping adalah?#pakai caranya

40 + x = 90°
x = 90 - 40
x = 50°

2y + y = 90°
3y = 90
y = 90/3
y = 30°

x° + 40° = 90°
x° = 90°- 40° = 50°

y° + 2y° = 90°
3y° = 90°
y = 90°/3 = 30°