Question

if a/b = 3/5 then 7a + 3b/7a -3b

Answer 1

let, a/b=3/5=k
that means, a=3k and b = 5k
now,
7a+3b/7a-3b
=21k+15k/21k-15k
=36k/6k
=6
that should be the answer
plz give it a brainlist answer mark

Answer 2

Hello friend

___________________________

If a/b = 3/5

: a = 3 and b = 5

So,by putting this values in the question we get

===> 7a + 3b/7a-3b

===> 7 x 3 + 3 x 5/7 x 3 - 3 x 5

===> 21 + 15/21-15

===> 36/6

===> 6/1

By invertendo we get

===> 1/6

Therefore, 7a + 3b/7a - 3b = 1/6

Thanks