If is the average of and , what is the average of for ?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
The average of 2k and 3d is simply (2k+3d)÷2 which equals 2m. Cross multiply giving 4m=2k+3d. So then, if d=2, we have 4m=2k+6. Making 2k the subject gives 4m-6. Again finding the average means dividing both sides of your result by 2, giving 2m-k=3. Which is our required solution to the problem. Convinced?