Question

Solve both the answers

Answer 1

n/3n-9:n/5n-25=5:3

3:3n-9 :: n:5n-25=5:3

3×5n-25 :3n-9×n=5:3

15n-75:3n^2-9n=5:3

15n-75/3n^2-9n=5:3

15-75/3n-9n=5:3

-60/-6n=0

n=10