Josh has 85 marbles. There are three times as many blue marbles as red while the rest are yellow. If there are 14 red marbles, how many yellow marbles are there? Think carefully first, then make a decision:
There are 14 x 3 = 42 blue marbles. The total number of blue and red marbles is 42 + 14 = 56. There are 85 - 56 = 29 yellow marbles. So, the answer is 29.