X dimes.
81-x nickels.
0.1x + 0.05(81-x) = 5.75
Multiply both sides by 100:
10x + 5(81-x) = 575.
x = ?
There are a total of 81 coins that equal $5.75. There are only dimes and nickels in the container. How many dimes are there? How many nickels are there?
1 answer
1 answer