a/3=b/7=c/8=k
a=3k
b=7k
c=8k
a+b+c=36
3k+7k+8k=36
18k=36
k=2
a=3k=6
b=7k=14
c=8k=16
a / 3 = b / 7 = c / 8 = K
a / 3 = K => a = 3 K
b / 7 = K => b = 7 K
c / 8 = K => c = 8 K
3 K + 7 K + 8 K = 36
10 K + 8 K = 36
18 K = 36
K = 36 : 18
K = 2
a = 2 x 3 = 6
b = 2 x 7 = 14
c = 2 x 8 = 16
