At a restaurant the ratio of kids meals sold to adult meals was 5:4. If there were 20 kids meal sold, what is the combined amount of kids and adult meals sold?

5:4 < - - - the ratio

5x:4x < - - - what the ratio represents

5x:20 < - - - 20 kids meals sold

20=4x < - - - since the 4x was replaced by 20, this is true

x=5 < - - - divide by 5

25:20 < - - - plug x into the ratio

25 adult meals + 20 kids meals=45 total meals