Question

please solve this question I will mark you as brainliest ​

Answer 1

Step-by-step explanation:

given that

a:b=c:d=K (let a/b=K)

then a = kb

and c= kd

now L.H.S,

3a+5b = 3kb+5b = b(3k+5) = b = R.H.S

3c+5d 3kd+5d. d(3k+5). a

Hence Proved.