Question

The combined average weight of an okapi and a llama is 450 kilograms. The average weight of 3 llamas is 190 kilograms more than the average weight of one okapi. On average, how much does an okapi weigh, and how much does a llama weigh?

Answer 1

Okapi=o llama=l

o+l=450

3l=190+o

I cant remember how to work it out but if you have a graphics calculator you would open a calculator page, press Menu:3:1 (solve function) and type in those equations. It would look like this:

solve(o+l=450 and 3l=190o,o)

l=160    o=290

llamas are 160kg and okapis are 290kg. Hope that helped a bit :)