16. $$ \quad \frac{n+5}{2}=10 $$ 17. $$ \quad \frac{n}{2}+5=10 $$ 18. $$ \frac{1}{2} n-5=10 $$ A. one-half the sum of $$ n $$ and 5 is 10 B. five less than half of $$ n $$ is 10 C. five added to half of $$ n $$ is 10

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**16. Equation: $$ \frac{n+5}{2}=10 $$**

1. Multiply both sides by 2:
   $$
   n + 5 = 20
   $$
2. Subtract 5 from both sides:
   $$
   n = 15
   $$
   
This corresponds to:  
A. one-half the sum of $$ n $$ and 5 is 10

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**17. Equation: $$ \frac{n}{2}+5=10 $$**

1. Subtract 5 from both sides:
   $$
   \frac{n}{2} = 5
   $$
2. Multiply both sides by 2:
   $$
   n = 10
   $$

This corresponds to:  
C. five added to half of $$ n $$ is 10

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**18. Equation: $$ \frac{1}{2} n -5=10 $$**

1. Add 5 to both sides:
   $$
   \frac{1}{2} n = 15
   $$
2. Multiply both sides by 2:
   $$
   n = 30
   $$

This corresponds to:  
B. five less than half of $$ n $$ is 10
16. $$ n = 15 $$ 17. $$ n = 10 $$ 18. $$ n = 30 $$

A. one-half the sum of and 5 is 10
B. five less than half of is 10
C. five added to half of is 10

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A. one-half the sum of and 5 is 10 B. five less than half of is 10 C. five added to half of is 10