Joe brought a bag of marbles. 1/4 of them were red,1/8 of them were green and the rest were yellow. If he brought 18 more marbles than red marbles, how many marbles did he buy?

1 answer

Total marbles = x

Red = (1/4)x
Green = (1/8)x
Yellow = (1/8)x

Your question is missing a word in the part 'he brought 18 more marbles than'

Take the difference of whichever colour has 18 more marbles than red, and solve for x.