Question

if a/3=b/4=c/7 then the value of a+b+c÷c is..​

Answer 1

$\frac{a}{3} = \frac{b}{4} = \frac{c}{7} = k \: ( \: where \: is \: a \: non \: zero \: constant) \\ a = 3k \: \: b = 4k \: \: \: c = \: 7k$
again
$\frac{a + b + c}{c} \\ \frac{3k + 4k + 7k}{7k} \\ \frac{14k}{7k} \\ 2$