Answer:
S = kpq 280 = k(5)(7) 280 = 35k 8 = k
Step-by-step explanation:
I uploaded a picture hope it helps
e : g = 2 : 7
e/f = 3/7
e = 3f/7
f/g = 2/3
g = 3f/2
e/g = (3f/7)/(3f/2) = 2/7