Im not sure what the question is asking but my guess would be c)18.
Answer:
B. 5
Step-by-step explanation:
Let x = length of shorter leg
longer leg = 
times the shorter leg
5 = x
x = 5
Answer: the 6th person is 23
Step-by-step explanation
The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.
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The best part of this problem is that it has one unknown variable in the form of "x" and a single equation. So getting to the desired solution becomes very easy.
The equation given in the question is
10 - 5x = 20
- 5x = 20 - 10
- 5x = 10
- x = 10/5
- x = 2
Multiplying both sides with -1 we get
x = -2
So the value of x is -2. I hope the procedure is clear enough for you to understand.
