Answer:

1.n=15

2.n=25

3.n=12

4.n=30

5.n=70

Step-by-step explanation:

1.9/n=3/5

3n=45

3n/3=45/3

n=15

2.15/n=3/5

3n=75

3n/3=75/3

n=25

3.n/20=3/5

5n=60

5n/5=60/5

n=12

4.n/50=3/5

5n=150

5n/5=150/5

n=30

5.42/n=3/5

3n=210

3n/3=210/3

n=70

I HOPE IT HELPS ☺️☺️☺️