Answer:

1.) n/11=21/33

33n=231

÷ 33 33

n=7

2.) 15/36=n/12

36n=180

÷ 36 36

n= 5

3.)99/30=33/n

99n= 990

÷ 99 99

n= 10

4.) 74/52=222/n

74n=11,544

÷74 74

n=156

5.)54/n= 27/24

1296=27n

÷ 27 27

48 =n

n=48

Answer:

1. n = 7
2. n = 5
3. n = 10
4. n = 156
5. n = 48