Question

solve this question is will mark as brainlist.

Answer 1

n / (n + 15) = 4 / 9

9 n = 4 (n + 15)

9 n = 4 n + 60

5 n = 60

n = 12

Answer 2

Hey mate!!!!


By cross multiplication we have
$4(n + 15) = 9n \\ 4n + 60 = 9n \\ 60 = 9n - 4n \\ 60 = 5n \\ n = \frac{60}{5} \\ n = 12$

n is 12


Hope it helps dear friend ☺️✌️✌️✌️