Question

Kesha has a total of 120 coins, all of which are either dimes or quarters. The total value of the

coins is $19.50. Find the number of each type of coin.
PLEASE HELP!!!

Answer 1

50 dimes 90 quarters

Explanation:

this problem needs 2 equations

1. D+Q = 140 ( shows the total amount of coins )

2. 0.1D+0.25Q = 27.50 ( shows the total cost )

the best way to do this is by subtraction

to get D by itself, the first equation would turn into D = 140 - Q

plug 140-Q into the second equation where you see D and solve for Q

once you solve it you should get Q = 90 then to get D it would be 140 - 90 which gives you D = 50.