ada yang bisa bantuin?

a-1=2
a=3

2b=a+3
2b=6
b=3

6c+b=5
6c+3=5
6c=2
c=1/3

#a - 1 = 2
a = 2 + 1 = 3

#2b = a + 3
b = (3 + 3)/2 = 6/2 = 3

#6c + b = 5
6c + 3 = 5
c = (5 - 3)/6 = 2/6 = 1/3


semoga membantu ^^