Question

Dave Bowers collects us gold coins He has a collection of 53 coins some are $10 coins, and the rest are $20 coins lf the face value of the coins is $750, how many of each denomination does he have?

Answer 1

Let x be the number of coins at $10

The number of coins at $20 are 53-x


Hence the equation:


10.x + 20(53-x) = 750

Solve for x & you will find x =31 (at $10/each) and the others, 22 at $20 each)