Question

Yang bought thrice as many blue marbles as pink marbles. He spent as much money on the blue marbles as he did on the pink marbkes. The difference between the cost of each blue marble and that of each pink marble was $0.60. Find the cost of a pink marble.

Answer 1

each pink marble is 90 cents. One blue marble is a third the price of a pink marble, and since yang bought 3 times more blue marbles than pink ones, the total prices are equal. Then you account for the difference between the costs. I'm not good at explaining, hope this helped