Answer:
n=32/5
Step-by-step explanation:
n = x * 3
n is your "number"
x=5
4x+10=30
-10 -10 on both sides
4x=20
Divide 4 on both sides
20/4=5
✨Hope this helps!!✨
To clean 20 identical rooms 5 people will take 1 hour .
Hope It Helps You.