a) X= b) Y= c) Z= TOLONG BANTU JAWAB..PENTING,THQ

a) 4X = 80
X = 20

b) y+3 = 180-80
y+3 = 100
y =97

c) 4z - 20 = 180-80
4z = 100 + 20
z = 120÷ 4 = 30