已知：a/b=c/d=e/f=1/4,3b+d+7f=16,求3a+c+7e=?

Question

已知：a/b = c/d = e/f = 1/4,3b+d+7f=16,求3a+c+7e=?

Answer 1

a/b = c/d = e/f = 1/4
a=b/4
c=d/4
e=f/4
3a+c+7e=1/4*(3b+d+7f)=4