problem

ararom

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Sep 20, 2007
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the average of 3a+4 and another number is 2a. What is the average of the other number and a?
 

Subhotosh Khan

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ararom said:
the average of 3a+4 and another number is 2a. What is the average of the other number and a?
If you have two numbers, m & n, what is the expression of average of those two numbers ? \(\displaystyle \frac{m+n}{2}\\)

Assume that the other number = x

What is the expression for average of 'x' and 3a+4?

Equate the above to '2a' - and solve for 'x'

Now find the average for 'a' and 'x' (from the solution above)
 
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