Solving
we get, 
Step-by-step explanation:
We need to solve: 
Solving:

Adding -ln(2) on both sides:


Using logarithmic rule: if 
So,

Simplifying:

So, Solving
we get, 
Keywords: Logarithms
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There are 12 boys 21/7=3 so 4(3)= 12
You are welcome
Answer:
-6, -2, 2, 6, 10
Step-by-step explanation: