Tlong bantu sya ngerjain donk...

x + 30 + 4x = 180
5x = 180 - 30
5x = 150
x = 150/5
x = 30

y + 20 + y + x + 30 = 180
2y = 180 - 50 - 30
2y = 180 - 80
2y = 100
y = 100/2
y = 50