Tolong Bantu..Dengan cara nya

5c=180-30
5c=150
c=30
4b=180-100
4b=80
b=20
2a+30=100
2a=70
a=35
jadi, a=35,b=20,c=30
a+b+c=35+20+30=85

4b + 30 + 2a = 180
2a + 4b = 150

30 + 5c = 180
5c = 150
c = 30

4b + 100 = 180
4b = 80
b = 20

2a + 4b = 150
2a + 80 = 150
2a = 70
a = 35

a + b + c = 35 + 20 + 30 = 85