# problem

#### ararom

##### New member
the average of 3a+4 and another number is 2a. What is the average of the other number and a?

#### Subhotosh Khan

##### Super Moderator
Staff member
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)