Question

9n=12+3n+9 cross multiplication
step by step​

Answer 1

Answer:

9n=12+3n+9

9n-3n=9-12

6n=-3

n=-3/6

n-1/2

Answer 2

Answer:

7/2

Step-by-step explanation:

9n = 12 + 3n + 9

9n - 3n = 12 + 9

6n = 21

n=21/6

n =7/2